Geography
Connecticut: 144 healthcare breach filings.
Connecticut entities have reported 144 breaches of 500 or more individuals to HHS since 2010, the 21st most of the 52 states and territories on the register, covering 11,295,626 individuals (25th by people affected). 9 are still under investigation. Hacking/IT Incident is the breach type on 63% of them, and network server the most common location (44%).
Filings
144
21st of 52 states and territories
Individuals affected
11,295,626
Median filing 5,000
Largest filing
5,556,702
Yale New Haven Health System, 2025
Hacking / IT share
63%
50 filings involve a business associate
Direct answer / Connecticut on the HHS portal
The largest Connecticut filing is Yale New Haven Health System (5,556,702 individuals, submitted 11 April 2025). The busiest year was 2020 with 19 filings. Healthcare Providers account for 59% of the state's filings. 47 filings of 10,000 or more individuals have their own page; the remaining 97 are listed in the table at the foot of this page.
Section CT.1 / Largest filings
Ten largest Connecticut breaches
| # | Covered entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|---|
| 1 | Yale New Haven Health System | Healthcare Provider | 5,556,702 | 11 Apr 2025 | |||
| 2 | Community Health Center, Inc.Open | Healthcare Provider | 1,060,936 | 30 Jan 2025 | |||
| 3 | Aetna ACE | Health Plan | 484,157 | 22 Dec 2020 | |||
| 4 | CareCentrix, Inc. | Healthcare Provider | 467,621 | 11 Jul 2019 | |||
| 5 | United Healthcare Services, Inc. Single Affiliated Covered Entity | Health Plan | 398,319 | 28 Jul 2023 | |||
| 6 | Orthopedics Rhode Island, Inc. | Healthcare Provider | 377,731 | 6 Nov 2024 | |||
| 7 | UConn Health | Healthcare Provider | 326,629 | 21 Feb 2019 | |||
| 8 | Aetna ACE | Health Plan | 325,278 | 27 Jul 2022 | |||
| 9 | United Healthcare Services, Inc. Single Affiliated Covered Entity | Health Plan | 315,915 | 7 Sep 2023 | |||
| 10 | Cierant CorporationOpen | Business Associate | 232,506 | 3 Jul 2025 |
Section CT.2 / By year
Connecticut filings by submission year
Each year links to the national year page.
| Year | Filings | Individuals affected | Hacking / IT share | Filings with a page |
|---|---|---|---|---|
| 2010 | 6 | 76,839 | 17% | 2 |
| 2011 | 4 | 100,214 | 0% | 1 |
| 2012 | 6 | 37,934 | 0% | 1 |
| 2013 | 1 | 1,382 | 0% | 0 |
| 2014 | 2 | 1,385 | 0% | 0 |
| 2015 | 4 | 5,115 | 25% | 0 |
| 2016 | 6 | 64,945 | 33% | 2 |
| 2017 | 7 | 27,844 | 29% | 1 |
| 2018 | 4 | 7,134 | 25% | 0 |
| 2019 | 11 | 878,096 | 82% | 5 |
| 2020 | 19 | 747,821 | 79% | 7 |
| 2021 | 12 | 58,096 | 92% | 1 |
| 2022 | 13 | 445,299 | 85% | 4 |
| 2023 | 16 | 885,642 | 75% | 6 |
| 2024 | 12 | 694,100 | 83% | 5 |
| 2025 | 13 | 7,128,489 | 77% | 7 |
| 2026 | 8 | 135,291 | 75% | 5 |
Section CT.3 / Composition
Breach type, location and who filed
Multi-valued fields count once per value.
Type of breach
Location of breached information
Covered entity type
Section CT.4 / Notification law
What Connecticut law required alongside HIPAA
State notification statute
Connecticut: Conn. Gen. Stat. 36a-701b
- Notice to individuals
- Without unreasonable delay, no later than 60 days after discovery
- Attorney general threshold
- All breaches (no minimum resident threshold) (No later than the time notice is provided to affected residents)
- Private right of action
- No: Non-compliance is an unfair trade practice; only the AG enforces
- Penalty
- Up to $5,000 per willful violation under CUTPA, plus injunctive relief and restitution
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 CT.5 / Filing pages
47 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 CT.6 / All other filings
97 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 |
|---|---|---|---|---|---|---|
| Star Group, L.P. Health Benefits Plan | Health Plan | 9,316 | 22 Oct 2021 | |||
| Aetna ACE | Health Plan | 9,191 | 3 May 2024 | |||
| Yale University | Healthcare Provider | 9,051 | 11 Nov 2022 | |||
| Aetna ACE | Health Plan | 8,664 | 14 Jul 2021 | |||
| United Way of Connecticut, Inc. | Business Associate | 8,039 | 3 Sep 2024 | |||
| Starling Physicians, PC | Healthcare Provider | 7,777 | 4 Sep 2020 | |||
| VNA Health Care Hartford Hospital | Healthcare Provider | 7,461 | 31 Jul 2012 | |||
| EMC | Business Associate | 7,461 | 30 Jul 2012 | |||
| Liberation Programs, Inc | Healthcare Provider | 7,406 | 2 Mar 2021 | |||
| Ryders Health Management LLC | Healthcare Provider | 7,252 | 7 Sep 2023 | |||
| Manchester Ophthalmology, LLC | Healthcare Provider | 6,846 | 24 Jan 2020 | |||
| TapestryHealth | Healthcare Provider | 6,494 | 22 Dec 2025 | |||
| Aetna | Health Plan | 6,372 | 27 Jul 2010 | |||
| Fiondella, Milone & LaSaracina, LLP | Business Associate | 6,215 | 14 Jan 2022 | |||
| Waterford Country School | Healthcare Provider | 6,211 | 5 Dec 2023 | |||
| Southwest Community Health Center | Healthcare Provider | 6,000 | 7 Jun 2017 | |||
| Aetna affiliated covered entity (ACE) | Health Plan | 5,991 | 13 Dec 2019 | |||
| Eastern Connecticut Pathology Consultants, P.C. | Healthcare Provider | 5,978 | 3 Sep 2021 | |||
| BHcare, Inc | Healthcare Provider | 5,827 | 14 Sep 2012 | |||
| Vernon Rehabilitation and Healthcare Center | Healthcare Provider | 5,416 | 3 Mar 2025 | |||
| Manchester Rehabilitation and Healthcare CenterOpen | Healthcare Provider | 5,415 | 3 Mar 2025 | |||
| Children's Center of Hamden | Healthcare Provider | 5,213 | 28 Aug 2025 | |||
| Valley Orthopaedic Specialists | Healthcare Provider | 5,062 | 26 May 2023 | |||
| Aetna Inc. | Health Plan | 5,002 | 20 Jun 2017 | |||
| Kids First Dentistry & Orthodontics, a subsidiary of Professional Dental Alliance of Connecticut, PLLC | Healthcare Provider | 5,000 | 28 Oct 2020 | |||
| Inline Plastics Corp. | Health Plan | 4,853 | 27 Nov 2023 | |||
| Sigmund Software, LLC | Business Associate | 4,767 | 20 Oct 2022 | |||
| United Healthcare Services, Inc. Single Affiliated Covered Entity | Health Plan | 4,264 | 8 Dec 2023 | |||
| Aetna ACE | Health Plan | 4,222 | 27 Dec 2022 | |||
| Futurity First Insurance Group | Business Associate | 3,994 | 11 Oct 2011 | |||
| Best Health Physical Therapy, LLC | Healthcare Provider | 3,764 | 6 Jun 2024 | |||
| The Connection, Inc. | Healthcare Provider | 3,736 | 7 Aug 2020 | |||
| Cigna | Health Plan | 3,720 | 16 May 2019 | |||
| United Seating and Mobility LLC dba Numotion | Healthcare Provider | 3,578 | 9 May 2019 | |||
| Cigna | Health Plan | 3,500 | 10 Oct 2018 | |||
| IBEW LOCAL 236 WELFARE FUND | Health Plan | 3,217 | 11 Jun 2024 | |||
| UnitedHealthcare | Health Plan | 3,215 | 12 Aug 2025 | |||
| Docs Medical Inc | Healthcare Provider | 3,146 | 15 Nov 2022 | |||
| NR Connecticut, LLC | Healthcare Provider | 3,045 | 7 Feb 2023 | |||
| Group Life Hospital and Medical Program | Health Plan | 3,000 | 29 Feb 2016 | |||
| Kurilec Eye Care, LLC | Healthcare Provider | 2,876 | 8 Jul 2022 | |||
| Starling Physicians | Healthcare Provider | 2,808 | 9 Jul 2021 | |||
| United Seating and Mobility, LLC d/b/a Numotion | Healthcare Provider | 2,722 | 10 Jun 2015 | |||
| Hartford HealthCare | Healthcare Provider | 2,651 | 13 Apr 2020 | |||
| Connecticut Children's Medical Center | Healthcare Provider | 2,633 | 14 Sep 2020 | |||
| Clinical Pathology Diagnostics, LLC | Healthcare Provider | 2,500 | 12 Oct 2021 | |||
| Aetna, Inc. | Health Plan | 2,345 | 7 Nov 2010 | |||
| HBP Financial Services Group, LTD | Business Associate | 2,238 | 8 Sep 2021 | |||
| Dental Center of Westport Group LLC | Healthcare Provider | 2,175 | 28 Jun 2021 | |||
| Aetna | Health Plan | 2,030 | 30 Jan 2019 | |||
| United Healthcare Services, Inc. Single Affiliated Covered Entity | Health Plan | 1,971 | 5 May 2023 | |||
| ConnectiCare | Health Plan | 1,834 | 21 Feb 2018 | |||
| Robbins Eye Center PC | Healthcare Provider | 1,749 | 28 Nov 2012 | |||
| Community Health Resources, Inc | Healthcare Provider | 1,634 | 28 Dec 2020 | |||
| Futurity First Insurance Group | Business Associate | 1,631 | 3 Oct 2011 | |||
| Aetna Inc. | Health Plan | 1,600 | 8 Nov 2017 | |||
| The Connecticut Institute for the Blind Inc. d/b/a Oak HillOpen | Healthcare Provider | 1,556 | 1 Jul 2026 | |||
| Aetna, Inc. | Health Plan | 1,506 | 23 Oct 2017 | |||
| University of Connecticut Health Center | Healthcare Provider | 1,382 | 8 Mar 2013 | |||
| Aetna ACE | Health Plan | 1,317 | 20 Dec 2024 | |||
| Western Connecticut Health Network | Healthcare Provider | 1,293 | 19 Aug 2019 | |||
| Sound Community Services, Inc. | Healthcare Provider | 1,278 | 26 May 2017 | |||
| Synergy Advanced Healthcare LLC | Healthcare Provider | 1,260 | 4 Nov 2025 | |||
| Stamford Health | Healthcare Provider | 1,255 | 30 Apr 2020 | |||
| ConnectiCare | Health Plan | 1,196 | 16 May 2022 | |||
| University of Connecticut Health Center Finance Corporation | Healthcare Provider | 1,123 | 13 Aug 2024 | |||
| United Healthcare Services, Inc. Single Affiliated Covered Entity | Health Plan | 1,116 | 12 May 2023 | |||
| Yale University | Healthcare Provider | 1,102 | 17 Oct 2018 | |||
| Best Health Physical Therapy, LLC | Healthcare Provider | 1,100 | 10 Nov 2016 | |||
| Pitney Bowes Management Services, Inc. | Business Associate | 1,089 | 28 Oct 2011 | |||
| Aetna ACE | Health Plan | 1,084 | 29 Jul 2020 | |||
| Stamford Hospital | Healthcare Provider | 1,050 | 15 Oct 2020 | |||
| Aetna ACE | Health Plan | 1,011 | 22 Sep 2021 | |||
| United Community & Family Services | Healthcare Provider | 1,000 | 12 Apr 2016 | |||
| Yale University | Healthcare Provider | 1,000 | 18 Aug 2010 | |||
| Starling Physicians, P.C. | Healthcare Provider | 977 | 11 Nov 2019 | |||
| Griffin Hospital | Healthcare Provider | 957 | 26 Mar 2010 | |||
| Middlesex Hospital | Healthcare Provider | 946 | 4 Dec 2015 | |||
| Independence Physical Therapy | Healthcare Provider | 925 | 25 May 2012 | |||
| Eastern Connecticut Health Network | Healthcare Provider | 912 | 2 Jul 2023 | |||
| Aetna ACE | Health Plan | 893 | 15 Feb 2022 | |||
| Saint Francis Hospital and Medical Center | Healthcare Provider | 858 | 16 Jan 2014 | |||
| Advanced Radiology Consultants, LLC | Healthcare Provider | 855 | 24 Jul 2015 | |||
| The Kennedy Collective | Healthcare Provider | 851 | 7 May 2024 | |||
| Pathology Consultants of New London, P.C. | Healthcare Provider | 835 | 8 Sep 2021 | |||
| Fairfield Anesthesia Associates LLC | Healthcare Provider | 800 | 27 Feb 2020 | |||
| Aetna | Business Associate | 775 | 27 Feb 2026 | |||
| Day Kimball Healthcare | Healthcare Provider | 698 | 22 Oct 2018 | |||
| Reid and Riege, P.C. | Business Associate | 610 | 28 Sep 2022 | |||
| Cigna Home Delivery Pharmacy | Healthcare Provider | 592 | 23 Nov 2015 | |||
| Performance Physical Therapy and Wellness | Healthcare Provider | 571 | 21 Jul 2017 | |||
| Aetna ACE | Health Plan | 562 | 26 May 2021 | |||
| United Healthcare Services, Inc. Single Affiliated Covered Entity | Health Plan | 527 | 17 Aug 2023 | |||
| Cigna | Business Associate | 527 | 9 Apr 2014 | |||
| Yale New Haven Health Services | Healthcare Provider | 506 | 5 Jun 2020 | |||
| Precipio, Inc.Open | Healthcare Provider | 501 | 23 Jan 2026 | |||
| Cromwell Fire District | Healthcare Provider | 500 | 10 Mar 2016 |
Index / Other states
Every state on the register
98
32
164
92
776
139
31
33
463
226
22
29
358
200
98
80
124
66
37
170
241
238
189
55
164
36
60
55
38
174
57
511
207
19
276
80
120
339
32
41
86
15
196
633
68
15
157
185
47
126
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.