State File CA / HHS OCR Breach Register776 filings, 2009 to 2026Retrieved 28 August 2026
Geography
California: 776 healthcare breach filings.
California entities have reported 776 breaches of 500 or more individuals to HHS since 2009, the 1st most of the 52 states and territories on the register, covering 79,739,461 individuals (4th by people affected). 60 are still under investigation. Hacking/IT Incident is the breach type on 51% of them, and network server the most common location (43%).
Filings
776
1st of 52 states and territories
Individuals affected
79,739,461
Median filing 3,553
Largest filing
13,400,000
Kaiser Foundation Health Plan, Inc., 2024
Hacking / IT share
51%
258 filings involve a business associate
Direct answer / California on the HHS portal
The largest California filing is Kaiser Foundation Health Plan, Inc. (13,400,000 individuals, submitted 12 April 2024). The busiest year was 2023 with 82 filings. Healthcare Providers account for 69% of the state's filings. 248 filings of 10,000 or more individuals have their own page; the remaining 528 are listed in the table at the foot of this page.
Section CA.1 / Largest filings
Ten largest California breaches
| # | Covered entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|---|
| 1 | Kaiser Foundation Health Plan, Inc. | Health Plan | 13,400,000 | 12 Apr 2024 | |||
| 2 | Delta Dental of California | Health Plan | 7,056,189 | 5 Sep 2023 | |||
| 3 | Episource, LLCOpen | Business Associate | 6,725,572 | 6 Jun 2025 | |||
| 4 | Blue Shield of California | Business Associate | 4,700,000 | 9 Apr 2025 | |||
| 5 | University of California, Los Angeles Health | Healthcare Provider | 4,500,000 | 17 Jul 2015 | |||
| 6 | Regal Medical Group,Lakeside Medical Organization, ADOC Acquisition, & Greater Covina Medical Group | Healthcare Provider | 3,388,856 | 1 Feb 2023 | |||
| 7 | PIH Health, Inc.Open | Healthcare Provider | 2,947,264 | 31 Jan 2025 | |||
| 8 | Smile Brands, Inc. | Business Associate | 2,592,494 | 24 Jun 2021 | |||
| 9 | Postmeds, Inc. | Healthcare Provider | 2,369,026 | 30 Oct 2023 | |||
| 10 | Keenan & Associates | Health Plan | 1,475,991 | 11 Dec 2023 |
Section CA.2 / By year
California filings by submission year
Each year links to the national year page.
| Year | Filings | Individuals affected | Hacking / IT share | Filings with a page |
|---|---|---|---|---|
| 2009 | 8 | 25,483 | 0% | 0 |
| 2010 | 17 | 174,007 | 0% | 6 |
| 2011 | 15 | 587,813 | 0% | 5 |
| 2012 | 31 | 347,027 | 0% | 8 |
| 2013 | 34 | 1,120,864 | 9% | 9 |
| 2014 | 36 | 348,137 | 17% | 8 |
| 2015 | 36 | 4,741,201 | 3% | 5 |
| 2016 | 41 | 1,440,214 | 22% | 7 |
| 2017 | 34 | 449,842 | 41% | 8 |
| 2018 | 38 | 897,686 | 26% | 8 |
| 2019 | 40 | 557,350 | 60% | 10 |
| 2020 | 53 | 2,283,521 | 70% | 23 |
| 2021 | 72 | 7,972,800 | 68% | 30 |
| 2022 | 53 | 2,361,021 | 66% | 23 |
| 2023 | 82 | 21,353,367 | 77% | 31 |
| 2024 | 66 | 17,741,302 | 80% | 32 |
| 2025 | 76 | 16,568,981 | 74% | 25 |
| 2026 | 44 | 768,845 | 86% | 10 |
Section CA.3 / Composition
Breach type, location and who filed
Multi-valued fields count once per value.
Type of breach
Hacking/IT Incident398 (51%)
Unauthorized Access/Disclosure174 (22%)
Theft172 (22%)
Loss26 (3%)
Other15 (2%)
Improper Disposal7 (1%)
Unknown3 (0%)
Location of breached information
Network Server334 (43%)
Email156 (20%)
Paper/Films119 (15%)
Laptop70 (9%)
Desktop Computer59 (8%)
Other Portable Electronic Device44 (6%)
Other40 (5%)
Electronic Medical Record37 (5%)
Covered entity type
Healthcare Provider535 (69%)
Business Associate134 (17%)
Health Plan104 (13%)
Healthcare Clearing House3 (0%)
Section CA.4 / Notification law
What California law required alongside HIPAA
State notification statute
California: Cal. Civ. Code 1798.82
- Notice to individuals
- Within 30 calendar days of discovery (effective 1 January 2026, SB 446)
- Attorney general threshold
- More than 500 California residents (Within 15 calendar days after notifying affected consumers)
- Private right of action
- Yes: Under CCPA Civ. Code 1798.150 for breaches from failure to maintain reasonable security; $107-$799 per consumer per incident (CPI-adjusted from $100-$750, effective Jan 2025)
- Penalty
- CCPA civil penalties of $2,663 per violation, $7,988 per intentional violation (CPI-adjusted, effective Jan 2025); CCPA private right of action for security-failure breaches
The HIPAA Breach Notification Rule runs alongside the state statute: notice to affected individuals and to HHS without unreasonable delay and no later than 60 days after discovery.
Section CA.5 / Filing pages
248 filings of 10,000 or more individuals
Each links to a page with the full filing, its rank in the state and year, OCR's closing summary where the case is archived, peers, and the modelled cost.
Section CA.6 / All other filings
528 filings below 10,000 individuals
Listed in full from the HHS export, largest first. These filings do not have their own page.
| Covered entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|
| Brightline, Inc. | Business Associate | 199,753 | 7 Apr 2023 | |||
| Brightline, Inc. | Business Associate | 31,440 | 7 Apr 2023 | |||
| Brightline, Inc. | Business Associate | 21,830 | 7 Apr 2023 | |||
| Bay Area Community Health | Healthcare Provider | 9,912 | 16 Jan 2026 | |||
| University of California San Francisco, Privacy Manager Breach | Healthcare Provider | 9,861 | 12 Mar 2014 | |||
| Michael R. Schwartz, MD Inc.Open | Healthcare Provider | 9,809 | 23 Oct 2025 | |||
| Tessie Cleveland Community Services Corp | Healthcare Provider | 9,747 | 16 Sep 2022 | |||
| Guardant Health, Inc. | Healthcare Provider | 9,309 | 26 Apr 2024 | |||
| Sharp Health Plan | Health Plan | 9,255 | 8 Jan 2024 | |||
| Fertility Specialists Medical Group | Healthcare Provider | 9,197 | 15 May 2023 | |||
| Hiawatha Harris MD, Inc. dba Pathways to Wellness Medication Clinics | Healthcare Provider | 9,182 | 18 May 2023 | |||
| Epic Care | Healthcare Provider | 9,000 | 9 Jun 2021 | |||
| Orlantino Dyoco, M.D. | Healthcare Provider | 9,000 | 3 Aug 2015 | |||
| Tieu Dental CorporationOpen | Healthcare Provider | 8,918 | 5 Mar 2026 | |||
| Kaiser Foundation Health Plan of the Mid-Atlantic States, Inc. | Health Plan | 8,556 | 17 Nov 2022 | |||
| Brightline, Inc. | Business Associate | 8,432 | 26 May 2023 | |||
| Hutton & Hale, D.D.S. | Healthcare Provider | 8,394 | 8 Jul 2020 | |||
| Health Net, Inc. | Health Plan | 8,331 | 2 Jul 2013 | |||
| Risk Program Administrators LLCOpen | Business Associate | 8,309 | 23 Jul 2026 | |||
| University of California, San Francisco | Healthcare Provider | 8,294 | 22 Nov 2013 | |||
| Molina Healthcare | Health Plan | 8,283 | 9 Sep 2022 | |||
| Sharp Health Plan | Health Plan | 8,200 | 8 Jan 2024 | |||
| Silver Creek Fitness & Physical Therapy, Silver Creek Physical Therapy Gilroy, Silver Creek Physical Therapy Sunnyvale, Silver Creek Physical Therapy | Healthcare Provider | 8,009 | 24 Oct 2016 | |||
| Southland Integrated Services, Inc. | Healthcare Provider | 7,988 | 10 Nov 2023 | |||
| Riverside County Regional Medical Center | Healthcare Provider | 7,925 | 29 Jan 2015 | |||
| Mission City Community Network | Healthcare Provider | 7,800 | 12 Mar 2014 | |||
| Molina Healthcare | Health Plan | 7,702 | 11 Jul 2023 | |||
| Covenant Care California, LLC, on behalf of relevant affiliated nursing facilities | Healthcare Provider | 7,678 | 6 Mar 2019 | |||
| Brightline, Inc. | Business Associate | 7,672 | 7 Apr 2023 | |||
| California Cancer Associates for Research and Excellence - Fresno | Healthcare Provider | 7,670 | 27 Jun 2025 | |||
| The People Concern | Healthcare Provider | 7,600 | 28 Apr 2022 | |||
| Sheldon M. Golden O.D., Optometric Corporation | Healthcare Provider | 7,583 | 19 Dec 2017 | |||
| Rundle Eye Associates | Healthcare Provider | 7,528 | 12 Jan 2023 | |||
| Catholic Charities CYO of The Archdiocese of San Francisco | Healthcare Provider | 7,486 | 30 Aug 2024 | |||
| Brightline, Inc. | Business Associate | 7,411 | 7 Apr 2023 | |||
| Sharecare Health Data Services, LLC | Business Associate | 7,300 | 11 Feb 2019 | |||
| University of California, San Francisco | Healthcare Provider | 7,300 | 27 Jan 2010 | |||
| CardioFit Medical Group, Inc.Open | Healthcare Provider | 7,243 | 9 Apr 2026 | |||
| St Joseph Heritage Health | Healthcare Provider | 7,229 | 28 Jun 2022 | |||
| Prime Healthcare | Healthcare Provider | 7,185 | 6 Dec 2023 | |||
| South Coast PediatricsOpen | Healthcare Provider | 7,000 | 5 Aug 2025 | |||
| Allergy Medical Group of the North Area, Inc. | Healthcare Provider | 6,934 | 29 Apr 2024 | |||
| Calibrated Healthcare, LLC | Business Associate | 6,890 | 2 Aug 2024 | |||
| Fred Finch Youth Center | Healthcare Provider | 6,871 | 5 Jun 2015 | |||
| Centric HealthOpen | Healthcare Provider | 6,855 | 10 Dec 2025 | |||
| Ron's Pharmacy Services | Healthcare Provider | 6,781 | 2 Feb 2018 | |||
| James C. Standring, DDSOpen | Healthcare Provider | 6,658 | 17 Jul 2026 | |||
| Feinstein and Roe Mds Inc. | Healthcare Provider | 6,642 | 21 Aug 2017 | |||
| Open Door Community Health Centers | Healthcare Provider | 6,633 | 8 Jan 2026 | |||
| 4 Over LLC Group Health Plan | Health Plan | 6,491 | 4 Dec 2023 | |||
| California Department of Health Care Services | Health Plan | 6,460 | 14 Mar 2023 | |||
| Altos Inc | Business Associate | 6,414 | 11 Aug 2025 | |||
| Rady Children's Hospital - San Diego | Healthcare Provider | 6,307 | 25 Jun 2014 | |||
| Asian Health Services | Healthcare Provider | 6,270 | 25 May 2023 | |||
| OptumRx, Inc. | Healthcare Provider | 6,229 | 12 Apr 2016 | |||
| Gardner Health Services | Healthcare Provider | 6,197 | 22 Dec 2025 | |||
| Michele Del Vicario, MD | Healthcare Provider | 6,145 | 20 Nov 2009 | |||
| Cerebral Medical Group, P.A. | Healthcare Provider | 6,110 | 19 Aug 2022 | |||
| SALIH M MAYALIDAG DENTAL CORP | Healthcare Provider | 6,000 | 12 Nov 2019 | |||
| AltaMed Health Services Corporation | Healthcare Provider | 6,000 | 15 Feb 2019 | |||
| Hal Meadows, M.D. | Healthcare Provider | 6,000 | 23 Sep 2016 | |||
| Santa Rosa Community Health Centers | Healthcare Provider | 5,983 | 26 Feb 2021 | |||
| City of Hope National Medical Center | Healthcare Provider | 5,900 | 23 Nov 2009 | |||
| Von Behren & Hunter LLP | Business Associate | 5,852 | 11 Apr 2022 | |||
| Mark A. Gillispie | Healthcare Provider | 5,845 | 6 Jun 2014 | |||
| Wood Ranch Medical | Healthcare Provider | 5,835 | 18 Sep 2019 | |||
| Life Generations Healthcare LLC | Healthcare Provider | 5,832 | 3 Nov 2023 | |||
| Indian Health Council Inc. | Healthcare Provider | 5,769 | 20 Nov 2020 | |||
| County of Sacramento | Healthcare Provider | 5,525 | 23 May 2023 | |||
| AltaMed Health Services Corporation | Healthcare Provider | 5,500 | 18 Apr 2019 | |||
| Palomar Health, Privacy Manager Breach | Healthcare Provider | 5,499 | 28 Mar 2014 | |||
| Muir Medical Group, IPA, Inc. | Business Associate | 5,485 | 22 May 2018 | |||
| Abrham Tekola, M.D.,INC | Healthcare Provider | 5,471 | 20 Jun 2014 | |||
| John Muir Physician Network | Healthcare Provider | 5,450 | 24 Apr 2010 | |||
| Eastern Los Angeles Regional Center | Business Associate | 5,441 | 13 Sep 2021 | |||
| Sacramento County Adult Correctional Health | Healthcare Provider | 5,372 | 27 Oct 2022 | |||
| Santa Rosa & Rohnert Park Oral Surgery | Healthcare Provider | 5,357 | 8 May 2020 | |||
| L. Douglas Carlson, M.D. | Healthcare Provider | 5,257 | 20 Nov 2009 | |||
| KP Northern CA Department of Research | Healthcare Provider | 5,178 | 2 Apr 2014 | |||
| Mark D. Lurie, MD | Healthcare Provider | 5,166 | 20 Nov 2009 | |||
| County of Los Angeles Department of Mental Health | Healthcare Provider | 5,129 | 20 Apr 2022 | |||
| GYN Emergent Care Center | Healthcare Provider | 5,080 | 21 Sep 2021 | |||
| Gardner Family Health Network | Healthcare Provider | 5,064 | 16 Apr 2019 | |||
| California Department of State Hospitals | Healthcare Provider | 5,014 | 17 Mar 2021 | |||
| San Mateo Medical Center | Healthcare Provider | 5,000 | 13 Nov 2018 | |||
| Port City Operating Company doing business as St. Joseph's Medical Center | Healthcare Provider | 4,984 | 31 Aug 2018 | |||
| Abode Services | Healthcare Provider | 4,905 | 22 Jun 2021 | |||
| Consolidated Tribal Health Project, Inc. | Healthcare Provider | 4,885 | 28 Apr 2015 | |||
| University of California Irvine Medical Center | Healthcare Provider | 4,859 | 17 Jun 2015 | |||
| Reimagine NetworkOpen | Healthcare Provider | 4,799 | 29 Aug 2025 | |||
| Orange County Health Authority | Health Plan | 4,732 | 12 Oct 2021 | |||
| Three Rivers Provider Network | Business Associate | 4,725 | 19 Dec 2022 | |||
| ZDI | Business Associate | 4,718 | 10 Jul 2013 | |||
| Contra Costa Health Services | Healthcare Provider | 4,700 | 7 Dec 2011 | |||
| Min Yi, M.D. | Healthcare Provider | 4,676 | 5 Feb 2014 | |||
| Bi-Bett Corporation | Business Associate | 4,639 | 25 Jul 2023 | |||
| Nephrology Associates Medical Group, IncOpen | Healthcare Provider | 4,631 | 27 Feb 2026 | |||
| Exceltox Laboratories | Healthcare Provider | 4,571 | 7 May 2021 | |||
| Dental Health Services | Health Plan | 4,562 | 16 Apr 2024 | |||
| AltaMed Health Services CorporationOpen | Healthcare Provider | 4,530 | 13 Jun 2025 | |||
| Sutter Health East Bay Region | Healthcare Provider | 4,479 | 5 Jul 2013 | |||
| Kaiser Permanente Health Plan, Inc of Northern California | Health Plan | 4,432 | 7 Nov 2016 | |||
| Mojave Radiation Oncology Medical Group | Healthcare Provider | 4,403 | 27 Jun 2025 | |||
| Desert AIDS Project | Healthcare Provider | 4,400 | 20 Apr 2012 | |||
| Kaiser Foundation Health Plan, Inc. | Health Plan | 4,389 | 14 Dec 2017 | |||
| California Health & Longevity Institute | Healthcare Provider | 4,386 | 25 May 2016 | |||
| One Community Health | Healthcare Provider | 4,309 | 2 Jan 2026 | |||
| Huntington Medical Research Institutes | Healthcare Provider | 4,300 | 20 Oct 2015 | |||
| Archer HealthOpen | Healthcare Provider | 4,285 | 6 Nov 2025 | |||
| Sequoia Benefits and Insurance Services, LLC, d/b/a Sequoia Consulting Group | Business Associate | 4,265 | 20 Dec 2022 | |||
| Napa Valley Dentistry | Healthcare Provider | 4,262 | 5 Oct 2016 | |||
| Native American Health Center | Healthcare Provider | 4,231 | 18 Jan 2024 | |||
| DGA-Producer Pension & Health Plans | Health Plan | 4,211 | 29 Feb 2024 | |||
| California Correctional Health Care Services | Healthcare Provider | 4,105 | 9 Apr 2025 | |||
| Qualcomm Incorporated | Health Plan | 4,102 | 15 Feb 2024 | |||
| BioIQ Inc. | Business Associate | 4,059 | 25 May 2018 | |||
| Brightline, Inc. | Business Associate | 4,044 | 7 Apr 2023 | |||
| Docs Medical Group, Inc. dba Pulse Urgent CareOpen | Healthcare Provider | 4,035 | 28 Dec 2025 | |||
| Health Plan of San Mateo | Health Plan | 4,032 | 18 Jan 2023 | |||
| Dr. Veronica Joann Barber | Business Associate | 4,000 | 28 Jul 2014 | |||
| Private National Mortgage Acceptance Company, LLC Group Health Plan | Health Plan | 3,972 | 9 Jun 2026 | |||
| Tarleton Medical | Healthcare Provider | 3,929 | 6 Mar 2017 | |||
| Institute on Aging | Healthcare Provider | 3,907 | 20 Jul 2018 | |||
| Seneca Family of Agencies | Healthcare Provider | 3,900 | 26 Oct 2021 | |||
| St. Mary Medical Center | Healthcare Provider | 3,900 | 14 May 2012 | |||
| Aloha Practice Management LLC | Business Associate | 3,835 | 7 Apr 2021 | |||
| Vascular Center of Intervention, Inc. | Healthcare Provider | 3,833 | 24 May 2023 | |||
| Good Samaritan Hospital | Healthcare Provider | 3,833 | 25 Oct 2013 | |||
| Hollister Family Dental & Implant CenterOpen | Healthcare Provider | 3,809 | 7 Jul 2026 | |||
| Adventist Health Physician Services | Healthcare Provider | 3,797 | 21 Jun 2019 | |||
| American Indian Health & Services, Inc. | Healthcare Provider | 3,784 | 6 May 2019 | |||
| Chico Immediate Care Medical Center, Inc. | Healthcare Provider | 3,780 | 19 Jan 2023 | |||
| Mission Neighborhood Health Center | Healthcare Provider | 3,741 | 19 Dec 2025 | |||
| Infor-Med Medical Information Systems Inc. | Business Associate | 3,728 | 13 May 2020 | |||
| Olive View-UCLA Medical Center | Healthcare Provider | 3,716 | 29 Mar 2024 | |||
| Sunshine Behavioral Health Group, LLC | Business Associate | 3,638 | 2 Dec 2019 | |||
| Childrens Hospital of Los Angeles | Healthcare Provider | 3,594 | 13 Jan 2017 | |||
| Axis Community Health | Healthcare Provider | 3,579 | 16 Jan 2026 | |||
| Beach District Surgery Center | Healthcare Provider | 3,560 | 13 Mar 2023 | |||
| University of California, San Francisco | Healthcare Provider | 3,553 | 3 Oct 2013 | |||
| Mendocino Community Health Clinic Inc. | Healthcare Provider | 3,538 | 29 Dec 2025 | |||
| Eureka Internal Medicine | Healthcare Provider | 3,534 | 4 Mar 2014 | |||
| Advanced NeuroSpinal Care | Healthcare Provider | 3,500 | 23 Feb 2010 | |||
| Torrance Memorial Medical Center | Healthcare Provider | 3,498 | 6 Mar 2020 | |||
| Frank D. Lanterman Regional Center | Healthcare Provider | 3,489 | 16 Jun 2020 | |||
| Kaiser Foundation Hospitals, Northern California and The Permanente Medical Group, Inc. | Healthcare Provider | 3,435 | 15 Jul 2024 | |||
| DJO, LLC | Healthcare Provider | 3,429 | 16 Oct 2020 | |||
| Gary Motykie, M.D., a Medical Corporation | Healthcare Provider | 3,400 | 5 Aug 2023 | |||
| Gary W Peer MD | Healthcare Provider | 3,400 | 18 Apr 2019 | |||
| City of Hope | Healthcare Provider | 3,400 | 3 Aug 2017 | |||
| Wonderful Center For Health Innovation | Healthcare Provider | 3,358 | 20 Jan 2017 | |||
| Indian Health Center of Santa Clara Valley | Healthcare Provider | 3,276 | 5 Jan 2026 | |||
| OB Pharmacy | Healthcare Provider | 3,241 | 3 Apr 2019 | |||
| Cathrine Steinborn, DDS | Healthcare Provider | 3,224 | 27 Feb 2015 | |||
| Word & Brown Insurance Administrators, Inc. | Business Associate | 3,223 | 23 Dec 2024 | |||
| AltaMed Health Services Corporation | Healthcare Provider | 3,206 | 29 Aug 2014 | |||
| Steven Yang, D.D.S., INC. | Healthcare Provider | 3,202 | 26 Jan 2018 | |||
| UC Davis Health | Healthcare Provider | 3,201 | 28 Jul 2023 | |||
| CSI Financial Services, LLC dba ClearBalance | Business Associate | 3,191 | 10 Jul 2021 | |||
| SynerMed / Inland Valleys IPA | Business Associate | 3,164 | 24 May 2013 | |||
| Serendipity Hearing Inc. | Healthcare Provider | 3,100 | 6 May 2021 | |||
| Kaiser Foundation Healthplan, Inc. of Southern California | Health Plan | 3,044 | 6 Nov 2016 | |||
| Natera, Inc. | Healthcare Provider | 3,035 | 15 Jul 2019 | |||
| St. Therese Medical Group, Inc | Healthcare Provider | 3,031 | 17 Sep 2012 | |||
| Easter Seal Society of Superior California, Privacy Manager Breach | Healthcare Provider | 3,026 | 7 Feb 2014 | |||
| Verity Health System of California, Inc. | Business Associate | 2,988 | 26 Jan 2019 | |||
| Prima Medical Foundation | Healthcare Provider | 2,933 | 26 Sep 2016 | |||
| L.A. Care Health Plan | Health Plan | 2,885 | 17 Apr 2026 | |||
| Share Ourselves | Healthcare Provider | 2,864 | 26 Dec 2025 | |||
| Long Beach Memorial Medical Center | Healthcare Provider | 2,864 | 11 Jul 2013 | |||
| Murali Menon, Privacy Manager Breach | Healthcare Provider | 2,855 | 30 Dec 2014 | |||
| Mono County | Healthcare Provider | 2,850 | 25 Sep 2020 | |||
| California Physicians' Services d/b/a Blue Shield of California | Health Plan | 2,841 | 27 Oct 2021 | |||
| Bay Area Pain Medical Associates | Healthcare Provider | 2,780 | 16 Jul 2014 | |||
| UCLA Health System | Healthcare Provider | 2,761 | 4 Nov 2011 | |||
| Miracle - Ear | Healthcare Provider | 2,710 | 19 Feb 2021 | |||
| Altos Inc | Business Associate | 2,700 | 11 Aug 2025 | |||
| Resource Anesthesiology Association of California, a Medical Corporation | Healthcare Provider | 2,700 | 5 Sep 2021 | |||
| Alameda Health System | Healthcare Provider | 2,691 | 15 Sep 2020 | |||
| Iron Mountain | Business Associate | 2,691 | 14 Nov 2014 | |||
| Valley Care Home Health Services, Inc. | Healthcare Provider | 2,674 | 25 Jan 2023 | |||
| Hill Country Community Clinic dba Hill Country Health and Wellness Center | Healthcare Provider | 2,658 | 1 Jun 2021 | |||
| Fishman Vision | Healthcare Provider | 2,646 | 1 Jun 2022 | |||
| Calif. Dept. of Health Care Services (DHCS) | Health Plan | 2,643 | 23 Dec 2012 | |||
| Shutterfly, LLC | Business Associate | 2,641 | 3 May 2022 | |||
| Milligan Chiropractic Group, Inc. d/b/a Del Mar Chiropractic Sports Group | Healthcare Provider | 2,640 | 30 Mar 2018 | |||
| EDI Health Group dba DentalXChange | Healthcare Clearing House | 2,574 | 29 Dec 2023 | |||
| J.D. Gilmour & Co., Inc. | Business Associate | 2,570 | 22 Jan 2024 | |||
| Hebrew Home for Aged Disabled d/b/a San Francisco Campus for Jewish Living | Healthcare Provider | 2,568 | 7 Apr 2025 | |||
| Sonoma Recovery Services, LLC d/b/a/ Olympia House | Healthcare Provider | 2,527 | 30 Sep 2020 | |||
| Kronick Moskovitz Tiedemann & GirardOpen | Business Associate | 2,511 | 28 Feb 2025 | |||
| San Franciso General Hospital and Trauma Center | Healthcare Provider | 2,500 | 6 Mar 2015 | |||
| 101 Family Medical Group, Privacy Manager Breach | Business Associate | 2,500 | 8 Jan 2014 | |||
| Family Care Medical Specialists Group, Inc. | Healthcare Provider | 2,490 | 8 Dec 2019 | |||
| Westside Community Services | Healthcare Provider | 2,484 | 15 Nov 2023 | |||
| La Clinica de La Raza, Inc. | Healthcare Provider | 2,477 | 22 Nov 2019 | |||
| Lee Rice D.O., Medical Corp DBA Lifewellness Institute | Healthcare Provider | 2,473 | 15 Jul 2016 | |||
| Sierra County Department of Public Health, Department of Behavioral Health | Healthcare Provider | 2,463 | 22 Nov 2023 | |||
| Native American Health Center | Health Plan | 2,451 | 14 Jan 2026 | |||
| Kaiser Foundation Health Plan, Inc. | Business Associate | 2,451 | 22 Apr 2016 | |||
| Pacific Gas and Electric Company | Business Associate | 2,426 | 5 Apr 2016 | |||
| Health Net, LLC. | Health Plan | 2,404 | 13 May 2019 | |||
| QuickRunner, Inc. (dba, RoadRunner Mailing Services) | Business Associate | 2,400 | 29 Mar 2013 | |||
| Salinas Valley Memorial Healthcare System | Healthcare Provider | 2,384 | 29 Jun 2020 | |||
| Laborers Funds Administrative Office of Northern California, Inc. | Health Plan | 2,373 | 15 Mar 2016 | |||
| Altos Inc | Business Associate | 2,366 | 11 Aug 2025 | |||
| Rady Children's Hospital San Diego | Healthcare Provider | 2,360 | 21 Feb 2020 | |||
| County of Los Angeles Department of Mental Health | Healthcare Provider | 2,334 | 5 Sep 2024 | |||
| Santa Clarita Community College District | Health Plan | 2,324 | 23 Feb 2024 | |||
| Redwoods Rural Health Center | Healthcare Provider | 2,306 | 18 Oct 2021 | |||
| Sutter Medical Foundation | Healthcare Provider | 2,302 | 11 Sep 2015 | |||
| Stanford Hospital & Clinics and School of Medicine, Privacy Manager Breach | Healthcare Provider | 2,300 | 3 Aug 2012 | |||
| Marin Healthcare District | Healthcare Provider | 2,292 | 27 Sep 2016 | |||
| Harbor Developmental Disabilities Foundation (d/b/a Harbor Regional Center)Open | Business Associate | 2,287 | 22 Apr 2026 | |||
| California Pacific Orthopaedics and Sports Medicine | Healthcare Provider | 2,271 | 30 Jun 2017 | |||
| UC Davis Medical Center, Privacy Manager Breach | Healthcare Provider | 2,269 | 14 Feb 2014 | |||
| Friends of Family Health Center | Healthcare Provider | 2,256 | 16 Dec 2025 | |||
| Long Beach Memorial Medical Center | Healthcare Provider | 2,250 | 11 Feb 2011 | |||
| Genesis Physical Therapy, Inc. | Healthcare Provider | 2,245 | 7 Oct 2016 | |||
| Sequoia Concepts, Inc. | Business Associate | 2,230 | 2 Sep 2021 | |||
| Keck Medicine of USC | Healthcare Provider | 2,200 | 29 Nov 2022 | |||
| UCLA Health | Healthcare Provider | 2,190 | 8 Sep 2022 | |||
| Hao Rong DDS Inc dba Genuine Care Dental | Healthcare Provider | 2,190 | 14 Mar 2020 | |||
| Dignity Health Medical Foundation | Healthcare Provider | 2,189 | 19 Dec 2017 | |||
| Hankyu Chung, M.D. | Healthcare Provider | 2,182 | 6 Sep 2013 | |||
| Golden State Radiation Oncology | Healthcare Provider | 2,130 | 27 Jun 2025 | |||
| Kaiser Foundation Hospitals, Northern California | Healthcare Provider | 2,121 | 23 Feb 2021 | |||
| Sacramento County Department of Health Services | Healthcare Provider | 2,096 | 9 Dec 2021 | |||
| Stanford University School of Medicine | Healthcare Provider | 2,063 | 28 May 2021 | |||
| Pinnacle Claims Management, Inc. | Business Associate | 2,048 | 3 Nov 2022 | |||
| Amyris Incorporated Health and Welfare Plan | Health Plan | 2,042 | 17 Mar 2026 | |||
| Tiburcio Vasquez Health Center Inc. | Healthcare Provider | 2,042 | 22 Jun 2021 | |||
| Rebekah Children's Services | Healthcare Provider | 2,033 | 3 Nov 2023 | |||
| Pratap S. Kurra, M.D. | Healthcare Provider | 2,029 | 12 Sep 2016 | |||
| Stephen J. Helvie, M.D. | Healthcare Provider | 2,013 | 22 Dec 2016 | |||
| Roots, Inc. | Healthcare Provider | 2,000 | 10 Oct 2025 | |||
| QUALITY-CARE PHARMACY | Healthcare Provider | 2,000 | 2 Apr 2018 | |||
| Brian Halevie-Goldman | Healthcare Provider | 2,000 | 20 Jul 2016 | |||
| ROBERT SOPER, M.D. | Healthcare Provider | 2,000 | 26 Aug 2015 | |||
| David Charles Rish | Business Associate | 2,000 | 10 Apr 2012 | |||
| Apria Healthcare | Healthcare Provider | 1,987 | 4 Oct 2016 | |||
| Molina Healthcare of Ohio, Inc. | Health Plan | 1,977 | 21 Dec 2023 | |||
| Orange County Radiation Oncology Medical Group | Healthcare Provider | 1,911 | 27 Jun 2025 | |||
| West Dermatology | Healthcare Provider | 1,900 | 18 May 2012 | |||
| Allergy & Asthma Medical Group of the Bay Area, Inc. | Healthcare Provider | 1,894 | 2 Jun 2020 | |||
| Providence Mission Heritage Endocrinology | Healthcare Provider | 1,875 | 26 Jun 2024 | |||
| Graybill Medical Group | Healthcare Provider | 1,863 | 15 Oct 2014 | |||
| Vitreo-Retinal Medical Group, Inc. | Healthcare Provider | 1,837 | 2 Aug 2013 | |||
| Foundation for Medical Care of Tulare and Kings Counties | Business Associate | 1,835 | 26 Oct 2021 | |||
| Pit River Health Service Inc.Open | Healthcare Provider | 1,800 | 6 Jan 2026 | |||
| Icon Family Healthcare LLCOpen | Healthcare Provider | 1,800 | 22 Apr 2025 | |||
| Muir Orthopaedic Specialists, A Medical Group Inc. | Healthcare Provider | 1,800 | 7 Sep 2011 | |||
| Authentic Recovery Center, LLC | Healthcare Provider | 1,790 | 17 Aug 2018 | |||
| American Sleep Medicine | Healthcare Provider | 1,787 | 16 Apr 2015 | |||
| Capital Neurological Surgeons | Healthcare Provider | 1,769 | 4 Aug 2023 | |||
| Fenwick & West Group Health Plan | Health Plan | 1,740 | 24 Mar 2026 | |||
| California Department of State Hospitals - Coalinga | Healthcare Provider | 1,738 | 3 Sep 2021 | |||
| Capitol Administrators, Inc | Business Associate | 1,733 | 11 May 2018 | |||
| O'Neil Digital Solutions, LLC | Business Associate | 1,722 | 30 Aug 2023 | |||
| Sierra Nevada Primary Care Physicians | Healthcare Provider | 1,717 | 16 Jul 2021 | |||
| California Physicians Service d/b/a Blue Shield of California | Health Plan | 1,717 | 13 Apr 2018 | |||
| WageWorks, Inc. | Business Associate | 1,700 | 13 Jan 2012 | |||
| Iron Mountain Records Management | Business Associate | 1,674 | 13 Aug 2014 | |||
| ZDI | Business Associate | 1,674 | 20 Dec 2013 | |||
| Minimed Distribution Corp | Healthcare Provider | 1,658 | 30 Apr 2021 | |||
| Child, Family and Community Services, Inc. | Health Plan | 1,658 | 3 Apr 2020 | |||
| San Fernando Valley Medical Group, Inc. | Healthcare Provider | 1,657 | 24 Mar 2021 | |||
| VibrantCare Rehabilitation, Inc. | Healthcare Provider | 1,655 | 8 Feb 2020 | |||
| On Lok Senior Health Services | Health Plan | 1,643 | 13 Jul 2021 | |||
| UC San Diego Health Hillcrest- Hillcrest Medical Center | Healthcare Provider | 1,642 | 8 Mar 2024 | |||
| Altos Inc | Business Associate | 1,634 | 11 Aug 2025 | |||
| Victor Community Support Services | Business Associate | 1,634 | 19 Mar 2021 | |||
| VA Palo Alto Health Care System | Healthcare Provider | 1,600 | 26 Mar 2018 | |||
| County of Los Angeles Department of Mental Health | Healthcare Provider | 1,598 | 20 May 2024 | |||
| AUTOAPS LLCOpen | Business Associate | 1,591 | 22 May 2026 | |||
| Han Van Duong M.D. Inc | Healthcare Provider | 1,571 | 14 Jan 2025 | |||
| California Physicians' Services dba Blue Shield of California | Health Plan | 1,553 | 5 Apr 2023 | |||
| Blue Shield of CaliforniaOpen | Business Associate | 1,543 | 6 Jun 2025 | |||
| Simonian Sports Medicine Clinic, A Medical Corporation | Healthcare Provider | 1,541 | 10 Sep 2018 | |||
| Solara Medical Supplies, LLC | Healthcare Provider | 1,531 | 17 Jan 2020 | |||
| Seneca Family of Agencies | Business Associate | 1,528 | 22 Jan 2022 | |||
| Altos Inc | Business Associate | 1,520 | 11 Aug 2025 | |||
| Blue Shield of California | Health Plan | 1,519 | 19 Nov 2021 | |||
| Sanger Skilled Care, LLC dba Cornerstone Care CenterOpen | Healthcare Provider | 1,510 | 7 May 2026 | |||
| Boutin JonesOpen | Business Associate | 1,506 | 21 Jul 2025 | |||
| Blue Shield of California | Health Plan | 1,506 | 12 Jul 2022 | |||
| L.A. Care Health Plan | Health Plan | 1,506 | 15 Mar 2019 | |||
| Christine D. Collins, APC & Ann Hofstadter, MD Inc. | Healthcare Provider | 1,500 | 27 Jul 2017 | |||
| Yuba Sutter Medical Clinic | Business Associate | 1,500 | 12 Sep 2016 | |||
| ADPI-West | Business Associate | 1,500 | 29 Nov 2012 | |||
| Mills-Peninsula Health Services | Healthcare Provider | 1,500 | 29 Jul 2011 | |||
| Molina Healthcare In | Business Associate | 1,499 | 16 Dec 2013 | |||
| East Bay Perinatal Medical Associates | Business Associate | 1,494 | 29 Jul 2015 | |||
| Santa Cruz Community Health | Healthcare Provider | 1,487 | 12 Jan 2026 | |||
| Eden Medical Center | Business Associate | 1,474 | 23 Sep 2010 | |||
| Oroville Hospital | Business Associate | 1,474 | 23 Sep 2010 | |||
| Coalinga Valley Health Clinics, Inc. | Healthcare Provider | 1,463 | 14 Jul 2020 | |||
| Madera County | Health Plan | 1,446 | 9 Aug 2023 | |||
| Center for Autism and Related Disorders | Healthcare Provider | 1,440 | 16 Oct 2020 | |||
| Kern Medical Center | Healthcare Provider | 1,431 | 12 Mar 2012 | |||
| inSite Digestive Health Care | Healthcare Provider | 1,424 | 9 Mar 2018 | |||
| County of Los Angeles Department of Mental Health | Healthcare Provider | 1,408 | 22 Mar 2024 | |||
| U.S. HealthWorks | Healthcare Provider | 1,400 | 9 Sep 2016 | |||
| Rob Meaglia, DDS | Healthcare Provider | 1,400 | 23 Dec 2013 | |||
| Dialpad, Inc. | Business Associate | 1,392 | 14 Nov 2022 | |||
| Sonoma Valley Hospital | Healthcare Provider | 1,386 | 24 May 2013 | |||
| Berkeley Endocrine Clinic | Business Associate | 1,370 | 24 May 2016 | |||
| County of San Bernardino Department of Public Heatlh | Healthcare Provider | 1,370 | 29 Nov 2012 | |||
| Coast Healthcare Management, LLC | Business Associate | 1,368 | 12 Feb 2013 | |||
| Loma Linda University Medical Center (LLUMC) | Healthcare Provider | 1,366 | 8 Feb 2012 | |||
| Eyefinity, Inc. | Business Associate | 1,352 | 14 Dec 2023 | |||
| California Correctional Health Care Services | Healthcare Provider | 1,348 | 14 Mar 2024 | |||
| Redwood Coast Regional Center | Healthcare Provider | 1,345 | 7 Aug 2023 | |||
| Sharon J. Jones, M.D. | Business Associate | 1,342 | 19 May 2015 | |||
| Sharon J. Jones M.D. | Healthcare Provider | 1,342 | 5 Mar 2015 | |||
| Luque Chiropractic, Inc. | Healthcare Provider | 1,341 | 17 Nov 2016 | |||
| Ventura County Health Care Agency | Healthcare Provider | 1,339 | 6 May 2015 | |||
| UC Davis Medical Center, Privacy Manager Breach | Healthcare Provider | 1,326 | 8 Oct 2014 | |||
| California Department of Developmental Services, Privacy Manager Breach | Healthcare Provider | 1,312 | 15 Jan 2013 | |||
| Palomar Health (Palomar Medical Center (Escondido) | Healthcare Provider | 1,309 | 8 Jan 2018 | |||
| Resource Anesthesiology Associates of CA PC | Healthcare Provider | 1,308 | 7 Nov 2022 | |||
| Northern Inyo Healthcare District | Healthcare Provider | 1,305 | 3 Jan 2024 | |||
| Sutter Valley Medical Foundation d/b/a Sutter Medical Foundation | Healthcare Provider | 1,303 | 22 Nov 2017 | |||
| Volunteers of America Southwest California | Healthcare Provider | 1,300 | 14 Jan 2022 | |||
| Michael Benjamin, M.D., Inc. | Healthcare Provider | 1,300 | 28 Dec 2015 | |||
| CDC Dental Management, Co., LLC dba Kids Care Dental & Orthodontics | Healthcare Provider | 1,286 | 7 Mar 2024 | |||
| Bakersfield Hematology Oncology Inc. | Healthcare Provider | 1,286 | 12 Jul 2021 | |||
| Diana S. Guth DBA Home Respiratory Care | Healthcare Provider | 1,285 | 28 Jan 2015 | |||
| County of Los Angeles Department of Mental Health | Healthcare Provider | 1,284 | 22 Dec 2023 | |||
| Sierra Management GroupOpen | Business Associate | 1,279 | 7 Jun 2026 | |||
| SAY San Diego | Healthcare Provider | 1,272 | 22 Dec 2017 | |||
| Doctors Medical Center of Modesto | Healthcare Provider | 1,259 | 23 Apr 2021 | |||
| Apple Valley Care Center | Healthcare Provider | 1,251 | 12 Aug 2014 | |||
| California Therapy Solutions | Healthcare Provider | 1,250 | 22 Dec 2010 | |||
| EDINGER MEDICAL GROUP | Healthcare Provider | 1,246 | 30 Jan 2026 | |||
| University of California, Los Angeles Health | Healthcare Provider | 1,242 | 1 Sep 2015 | |||
| Valley COmmunity Healthcare | Healthcare Provider | 1,233 | 6 Mar 2015 | |||
| Kern County Mental Health | Health Plan | 1,212 | 14 Jun 2016 | |||
| Boomerang Healthcare | Healthcare Provider | 1,204 | 7 Nov 2023 | |||
| DJO, LLC | Healthcare Provider | 1,203 | 6 Jan 2018 | |||
| Andrea Yaley, DDS | Healthcare Provider | 1,200 | 10 Jul 2017 | |||
| Lancaster Cardiology Medical Group, and Sunder Heart Institute and Vascular Medical Clinic | Healthcare Provider | 1,200 | 24 Aug 2015 | |||
| Fidelity National Technology Imaging (FNTI) | Business Associate | 1,192 | 10 Jun 2011 | |||
| EPIC Management, LLC | Health Plan | 1,190 | 8 Mar 2023 | |||
| The Guidance Center | Healthcare Provider | 1,189 | 28 Oct 2019 | |||
| Lake County Behavioral Health Services | Healthcare Provider | 1,178 | 31 Jan 2020 | |||
| San Francisco Department of Public Health - Zuckerberg SF General Hospital | Healthcare Provider | 1,174 | 16 Dec 2019 | |||
| Stanislaus Surgical Hospital | Healthcare Provider | 1,170 | 4 Jun 2015 | |||
| Valley RadiologyOpen | Healthcare Provider | 1,166 | 25 Sep 2025 | |||
| West Anaheim Medical Center | Healthcare Provider | 1,166 | 29 Nov 2023 | |||
| Healthcare In ActionOpen | Healthcare Provider | 1,143 | 30 Mar 2026 | |||
| Kaiser Permanente Northern California | Health Plan | 1,136 | 12 Jul 2016 | |||
| Gordon Schanzlin New Vision Institute | Healthcare Provider | 1,130 | 10 Aug 2018 | |||
| Kindred Nursing Centers West, L.L.C. | Healthcare Provider | 1,125 | 25 Sep 2015 | |||
| Desert Oasis Healthcare | Healthcare Provider | 1,122 | 4 Jan 2021 | |||
| Pinnacle Claims Management | Business Associate | 1,119 | 21 Nov 2024 | |||
| Tahoe Forest Hospital District | Healthcare Provider | 1,119 | 17 Jul 2023 | |||
| Guardant Health, Inc. | Healthcare Provider | 1,112 | 14 Sep 2018 | |||
| Hamner Square Dental, Privacy Manager Breach | Healthcare Provider | 1,112 | 16 Jul 2012 | |||
| Palo Verde Hospital, Privacy Manager Breach | Healthcare Provider | 1,100 | 25 Feb 2014 | |||
| Precision Medical Products Inc. | Healthcare Clearing House | 1,094 | 9 May 2024 | |||
| Miracle - Ear | Healthcare Provider | 1,094 | 19 Feb 2021 | |||
| John Muir Physician Network | Healthcare Provider | 1,081 | 24 Jun 2021 | |||
| Salusive Health Inc. MyNurse | Healthcare Provider | 1,072 | 29 Apr 2022 | |||
| Molina Healthcare | Health Plan | 1,068 | 26 Sep 2022 | |||
| RoxSan Pharmacy, Inc. | Healthcare Provider | 1,049 | 12 Mar 2018 | |||
| Redwood Memorial Hospital | Healthcare Provider | 1,039 | 19 Nov 2013 | |||
| California Correctional Health Care Services | Healthcare Provider | 1,033 | 16 Aug 2013 | |||
| VA Long Beach Healthcare System | Healthcare Provider | 1,030 | 22 Jun 2018 | |||
| Children's Eyewear Sight | Healthcare Provider | 1,030 | 12 Jan 2015 | |||
| John E. Gonzalez DDS | Healthcare Provider | 1,025 | 14 Aug 2016 | |||
| City of Hope | Healthcare Provider | 1,024 | 4 Mar 2016 | |||
| Altos Inc | Business Associate | 1,011 | 11 Aug 2025 | |||
| Golden State Dermatology | Healthcare Provider | 1,010 | 19 Jan 2022 | |||
| Sierra View District Hospital | Healthcare Provider | 1,009 | 20 Sep 2013 | |||
| Altior Healthcare, LLCOpen | Healthcare Provider | 1,002 | 11 Apr 2025 | |||
| Welcome Dentistry-AnaheimOpen | Healthcare Provider | 1,001 | 15 Aug 2025 | |||
| Welcome Dentistry-Los AngelesOpen | Healthcare Provider | 1,001 | 13 Aug 2025 | |||
| California Correctional Health Care Services, Privacy Manager Breach | Healthcare Provider | 1,001 | 30 Jul 2013 | |||
| CalOptima | Health Plan | 1,000 | 22 Aug 2016 | |||
| AccentCare Home Health of California, Inc. Medicare # 057564 CA state License # 080000226 | Healthcare Provider | 1,000 | 10 Apr 2012 | |||
| Children's Hospital & Research Center at Oakland | Healthcare Provider | 1,000 | 29 Jun 2010 | |||
| Gallant Risk & Insurance Services, Inc. | Business Associate | 995 | 3 Jun 2015 | |||
| Clovis Community Medical Center | Healthcare Provider | 994 | 26 Feb 2021 | |||
| Kaiser Permanente | Healthcare Provider | 990 | 26 Sep 2019 | |||
| Jewish Family and Community Services- East Bay | Healthcare Provider | 987 | 10 Dec 2025 | |||
| CerenadeOpen | Business Associate | 987 | 30 Nov 2025 | |||
| Jackson Lewis P.C. | Business Associate | 986 | 17 Feb 2023 | |||
| Philip P Corneliuson, DDS, INC. | Healthcare Provider | 980 | 22 Oct 2012 | |||
| Andrew Dang, DDS | Healthcare Provider | 974 | 4 Jun 2020 | |||
| Baker Places, Inc. | Business Associate | 971 | 16 Aug 2024 | |||
| SHIELDS For Families | Healthcare Provider | 961 | 26 Apr 2012 | |||
| Community Memorial Health System | Healthcare Provider | 959 | 5 Sep 2017 | |||
| City of Corona, Privacy Manager Breach | Business Associate | 958 | 13 Dec 2012 | |||
| Joseph F. Lopez, MD | Healthcare Provider | 952 | 20 Nov 2009 | |||
| Belkorp Ag, LLC | Health Plan | 942 | 29 Sep 2025 | |||
| City of Berkeley, Privacy Manager Breach | Business Associate | 931 | 29 Nov 2012 | |||
| LORENZO BROWN, MD INC. | Healthcare Provider | 928 | 29 Sep 2010 | |||
| Rehabilitation Hospital of Southern California | Healthcare Provider | 925 | 29 Mar 2024 | |||
| Pedes Orange County, Inc. | Healthcare Provider | 917 | 12 Jan 2018 | |||
| John A. Grimaldi DO INC | Healthcare Provider | 911 | 16 Apr 2020 | |||
| City Dental | Healthcare Provider | 900 | 14 Jul 2020 | |||
| San Francisco Department of Public Health | Healthcare Provider | 900 | 25 Jun 2018 | |||
| Molina Healthcare | Health Plan | 895 | 22 Feb 2019 | |||
| Altos Inc | Business Associate | 882 | 11 Aug 2025 | |||
| County of Los Angeles | Healthcare Provider | 880 | 29 Apr 2015 | |||
| Advanced Clinical Research Institute | Health Plan | 875 | 14 Mar 2012 | |||
| Western Health Advantage | Health Plan | 869 | 13 Dec 2019 | |||
| Contra Costa Health Plan | Health Plan | 862 | 13 Dec 2018 | |||
| Sutter North Surgery Center | Healthcare Provider | 861 | 8 Sep 2023 | |||
| Branch Metrics, Inc. | Health Plan | 857 | 10 Apr 2026 | |||
| Silverberg Surgical and Medical Group | Healthcare Provider | 857 | 25 Sep 2015 | |||
| David I. Cohen, MD | Healthcare Provider | 857 | 20 Nov 2009 | |||
| Bakersfield Rehabilitation Hospital | Healthcare Provider | 852 | 29 Mar 2024 | |||
| Southern California United Food & Commercial Workers Unions and Food Employers Benefit Fund | Health Plan | 850 | 8 Jul 2022 | |||
| Anil Mehta, MD, Inc. | Healthcare Provider | 846 | 12 Jun 2020 | |||
| Tulare County Health & Human Services Agency | Healthcare Provider | 845 | 2 Apr 2015 | |||
| California Pacific Medical Center | Healthcare Provider | 845 | 23 Jan 2015 | |||
| California Physicians' Service d/b/a Blue Shield of California | Health Plan | 843 | 9 Jun 2015 | |||
| Watsonville Chiropractic, Inc. | Healthcare Provider | 829 | 17 Nov 2016 | |||
| PIH Health Hospital - Whittier | Healthcare Provider | 826 | 2 Apr 2015 | |||
| Community Health Group | Health Plan | 824 | 28 Feb 2023 | |||
| Telecare Corporation | Healthcare Provider | 823 | 30 Sep 2019 | |||
| John Muir Health - Walnut Creek Medical Center | Healthcare Provider | 821 | 13 Apr 2023 | |||
| Alicia Ann Oswald | Healthcare Provider | 800 | 9 Jan 2018 | |||
| White Blossom Care Center | Healthcare Provider | 800 | 30 Jun 2017 | |||
| Jesle Kuizon | Business Associate | 800 | 18 Jul 2013 | |||
| Healthy Connections, Inc | Healthcare Provider | 793 | 14 Apr 2014 | |||
| Blue Shield of California | Health Plan | 783 | 21 Jul 2025 | |||
| Ventura County Health Care Agency | Healthcare Provider | 777 | 20 Sep 2016 | |||
| Kern Regional Center | Healthcare Provider | 772 | 26 Jan 2024 | |||
| Memorial Hospital of Gardena | Healthcare Provider | 771 | 25 Nov 2010 | |||
| Stanislaus County Behavioral Health and Recovery Services | Health Plan | 767 | 24 Oct 2024 | |||
| Brightside Health, Inc. | Healthcare Provider | 767 | 30 Apr 2023 | |||
| Sage Behavior Services, Inc | Healthcare Provider | 763 | 25 Jun 2020 | |||
| Community Family Care Medical Group IPA, Inc. | Healthcare Provider | 763 | 13 Sep 2017 | |||
| David S. Ng, O.D. | Healthcare Provider | 758 | 16 Jun 2018 | |||
| Zuckerberg San Francisco General Hospital and Trauma Center | Healthcare Provider | 754 | 4 Apr 2024 | |||
| Sharp Memorial Hospital | Healthcare Provider | 754 | 28 Feb 2017 | |||
| Cadence Aerospace | Health Plan | 747 | 8 Apr 2021 | |||
| Physician's Automated Laboratory | Healthcare Provider | 745 | 23 May 2012 | |||
| County of Los Angeles | Healthcare Provider | 743 | 30 Aug 2016 | |||
| Hoag Clinic | Healthcare Provider | 738 | 3 Aug 2020 | |||
| California Correctional Health Care Services | Healthcare Provider | 738 | 9 Feb 2017 | |||
| San Francisco VA Health Care System | Healthcare Provider | 735 | 29 Nov 2019 | |||
| Restorative Arts Physical Therapy, Inc. d/b/a Core Conditioning | Healthcare Provider | 727 | 28 Oct 2022 | |||
| Southern Indian Health Council, Inc. | Healthcare Provider | 727 | 11 Sep 2020 | |||
| Vibrant Body Wellness | Healthcare Provider | 726 | 11 Mar 2016 | |||
| SCLARCOpen | Business Associate | 722 | 6 Mar 2025 | |||
| Hoyman Hong, M.D. | Healthcare Provider | 720 | 17 Mar 2021 | |||
| Kaiser Foundation Health Plan | Health Plan | 720 | 20 Oct 2017 | |||
| Northridge Hospital Medical Center | Healthcare Provider | 716 | 2 Nov 2010 | |||
| St. Joseph's Medical Center | Healthcare Provider | 712 | 29 Mar 2012 | |||
| Community Health Group Partnership Plan | Health Plan | 708 | 27 Feb 2024 | |||
| Motion Picture Industry Health Plans (MPI) | Health Plan | 703 | 15 Feb 2012 | |||
| Thomas J O'Laughlin, MD | Business Associate | 700 | 7 Oct 2011 | |||
| Kaiser Foundation Health Plan, Inc. | Health Plan | 695 | 6 Apr 2022 | |||
| Health Plan of San Mateo | Health Plan | 694 | 29 Jun 2011 | |||
| Regional Center of the East Bay | Healthcare Provider | 689 | 9 Jul 2025 | |||
| County of San Bernardino, Department of Behavioral Health | Health Plan | 686 | 25 Feb 2013 | |||
| Equinix Incorporated Group Health and Welfare Benefit Plan | Health Plan | 677 | 22 May 2026 | |||
| Orange County Global Medical Center | Healthcare Provider | 677 | 2 Mar 2017 | |||
| University of California, San Francisco | Healthcare Provider | 676 | 26 Apr 2023 | |||
| Blue Shield of CaliforniaOpen | Business Associate | 673 | 23 Jun 2025 | |||
| THE R.O.A.D.S. Foundation Inc. DBA R.O.A.D.S. Community Care Clinic | Healthcare Provider | 670 | 26 Jan 2017 | |||
| County of Los Angeles | Healthcare Provider | 667 | 30 Mar 2011 | |||
| Verity Health System of California, Inc. | Business Associate | 662 | 3 May 2019 | |||
| Sonoma County Indian Health Project, Inc | Healthcare Provider | 662 | 30 Mar 2018 | |||
| St. Anne's Family Services | Healthcare Provider | 661 | 10 Nov 2021 | |||
| Personalis, Inc.Open | Healthcare Provider | 650 | 4 Feb 2026 | |||
| Imperial Valley Family Care Medical Group, APC | Healthcare Provider | 649 | 13 May 2016 | |||
| VA Northern California Health Care System | Healthcare Provider | 645 | 24 Mar 2021 | |||
| California Cancer Associates for Research and Excellence - San Diego | Healthcare Provider | 638 | 27 Jun 2025 | |||
| Kaiser Foundation Health Plan, Inc. | Health Plan | 638 | 22 Dec 2017 | |||
| Danube River Holdings LLC dba RiverPointe Post Acute | Healthcare Provider | 633 | 7 Jun 2020 | |||
| Peter J Parker, M.D., Inc. | Healthcare Provider | 628 | 19 Jun 2018 | |||
| Blue Shield of California | Health Plan | 624 | 28 Feb 2025 | |||
| California College of Arts | Health Plan | 623 | 26 Feb 2018 | |||
| San Francisco Department of Public Health | Healthcare Provider | 622 | 3 Oct 2019 | |||
| Vibra Hospital of Sacramento, LLC | Healthcare Provider | 620 | 3 Oct 2025 | |||
| Robert B. Miller, MD | Healthcare Provider | 620 | 17 May 2011 | |||
| Mercy Medical Center Redding - Oncology Clinic, Privacy Manager Breach | Healthcare Provider | 616 | 22 Dec 2014 | |||
| Robert B. Neves, M.D. | Business Associate | 611 | 24 Jan 2014 | |||
| University of California, San Francisco | Healthcare Provider | 610 | 15 Dec 2009 | |||
| Kaiser Foundation Health Plan | Health Plan | 609 | 8 Sep 2017 | |||
| Blue Shield of California | Business Associate | 607 | 29 Sep 2025 | |||
| TEMPLE COMMUNITY HOSPITAL | Healthcare Provider | 603 | 15 Aug 2012 | |||
| County of Santa Barbara, Department of Behavioral Wellness | Healthcare Provider | 601 | 23 May 2022 | |||
| Napa Integrated Medicine PC | Business Associate | 600 | 19 Oct 2023 | |||
| Welcome HealthOpen | Healthcare Provider | 597 | 6 Sep 2024 | |||
| Kern Medical Center | Healthcare Provider | 596 | 10 Dec 2009 | |||
| VA Long Beach Healthcare System | Healthcare Provider | 592 | 4 Jul 2014 | |||
| Santa Clara Valley Medical Center | Healthcare Provider | 579 | 27 Sep 2013 | |||
| Ouster, Inc. | Health Plan | 574 | 30 Apr 2026 | |||
| Synergy Specialists Medical Group, Inc / Jay S. Berenter, DPM | Healthcare Provider | 569 | 27 Jan 2017 | |||
| University Muslim Medical Association | Healthcare Provider | 563 | 29 Sep 2020 | |||
| Riverside County Regional Medical Center | Healthcare Provider | 563 | 24 Jun 2014 | |||
| Bay Area Pain and Wellness Center | Healthcare Provider | 548 | 14 Jun 2017 | |||
| Boulevard Surgical Associates | Healthcare Provider | 542 | 20 Jun 2019 | |||
| Gold Coast Health Plan | Health Plan | 540 | 30 Dec 2025 | |||
| Denise M. Bowden, LAc | Healthcare Provider | 538 | 11 Jun 2018 | |||
| Calvin Schuster,MD | Healthcare Provider | 532 | 4 Jan 2013 | |||
| Lucille Packard Children's Hospital | Healthcare Provider | 532 | 21 Feb 2010 | |||
| Valley Mountain Regional Center | Business Associate | 529 | 25 Jul 2025 | |||
| Julieta Y. Echeverria D.D.S., Inc. | Healthcare Provider | 529 | 20 May 2022 | |||
| Glendale Adventist Medical Center | Healthcare Provider | 528 | 28 Nov 2016 | |||
| Family Health Centers of San Diego | Healthcare Provider | 523 | 12 May 2026 | |||
| Asian Americans for Community Involvement | Healthcare Provider | 521 | 5 Jan 2026 | |||
| Brandman Centers for Senior Care | Health Plan | 521 | 18 Mar 2021 | |||
| Mercy Medical Center Redding | Healthcare Provider | 520 | 29 Jun 2016 | |||
| Sutter Senior Care | Healthcare Provider | 519 | 22 Jul 2023 | |||
| Kaiser Foundation Health Plan (Kaiser Permanente) | Health Plan | 515 | 7 Nov 2019 | |||
| Encompass Family and internal medicine group | Healthcare Provider | 507 | 13 May 2019 | |||
| Chinese Community Health Plan | Health Plan | 502 | 11 Apr 2022 | |||
| Hillsides | Healthcare Provider | 502 | 30 Dec 2015 | |||
| United Medical DoctorsOpen | Healthcare Provider | 501 | 29 May 2026 | |||
| Palomar Health Medical GroupOpen | Healthcare Provider | 501 | 8 May 2026 | |||
| Glendora Surgery CenterOpen | Healthcare Provider | 501 | 27 Mar 2026 | |||
| AltaMed Health Services CorporationOpen | Healthcare Provider | 501 | 26 Feb 2026 | |||
| Covenant Care California, LLC | Healthcare Provider | 501 | 12 Jan 2024 | |||
| Friesen GroupOpen | Healthcare Provider | 500 | 8 Aug 2025 | |||
| Sharp HealthCareOpen | Healthcare Provider | 500 | 6 Jun 2025 | |||
| Berkeley Research Group, LLCOpen | Business Associate | 500 | 30 Apr 2025 | |||
| Ryu Physical Therapy, P.C. | Healthcare Provider | 500 | 11 Mar 2023 | |||
| Miracle-Ear | Healthcare Provider | 500 | 5 Mar 2021 | |||
| Alameda Alliance for Health | Health Plan | 500 | 28 Feb 2020 | |||
| Office of Dr. David Elbaum | Healthcare Provider | 500 | 9 Jan 2017 | |||
| Tri-City Medical Center | Healthcare Provider | 500 | 18 Aug 2014 |
Index / Other states
Every state on the register
AlabamaAL
98
AlaskaAK
32
ArizonaAZ
164
ArkansasAR
92
ColoradoCO
139
ConnecticutCT
144
DelawareDE
31
District of ColumbiaDC
33
FloridaFL
463
GeorgiaGA
226
HawaiiHI
22
IdahoID
29
IllinoisIL
358
IndianaIN
200
IowaIA
98
KansasKS
80
KentuckyKY
124
LouisianaLA
66
MaineME
37
MarylandMD
170
MassachusettsMA
241
MichiganMI
238
MinnesotaMN
189
MississippiMS
55
MissouriMO
164
MontanaMT
36
NebraskaNE
60
NevadaNV
55
New HampshireNH
38
New JerseyNJ
174
New MexicoNM
57
New YorkNY
511
North CarolinaNC
207
North DakotaND
19
OhioOH
276
OklahomaOK
80
OregonOR
120
PennsylvaniaPA
339
Puerto RicoPR
32
Rhode IslandRI
41
South CarolinaSC
86
South DakotaSD
15
TennesseeTN
196
TexasTX
633
UtahUT
68
VermontVT
15
VirginiaVA
157
WashingtonWA
185
West VirginiaWV
47
WisconsinWI
126
WyomingWY
19
Index / Companion schedules
13 HHS breach register
→Hub: every filing, by state, year and entity.
04 Biggest breaches
→Mega-breaches with primary-source cost figures.
Industry / Healthcare
→IBM 2026: $6.64M average, 13 years at #1.
Regulation / HIPAA penalties
→OCR enforcement tiers and the 60-day rule.
11 50-state laws
→Deadline, AG threshold and penalties per state.
Cost / Per record
→Where the per-record model is reliable.
Provenance
Source: U.S. Department of Health and Human Services, Office for Civil Rights, Breach Portal (breaches affecting 500 or more individuals), retrieved 2026-08-28. Public domain. Individuals affected and dates as reported by the covered entity.
Portal: ocrportal.hhs.gov breach report. Statutory basis: HITECH Act section 13402(e)(4): the Secretary must post a list of breaches of unsecured protected health information affecting 500 or more individuals. Breaches affecting fewer than 500 individuals are reported to OCR annually and are not posted, so they are not on this register. Status wording follows the portal's two tabs ("Cases Currently Under Investigation" and "Archive") as of 28 August 2026; a filing moves to the archive when OCR closes the case. Modelled costs on this site are a method applied to the reported count, using IBM Cost of a Data Breach per-record figures, and are never a cost disclosed by the entity.
Corrections: if you represent a listed entity and the portal row has been amended, email [email protected] with the portal entry and we will re-pull the export.