Breach filing
ArchivedResource Anesthesiology Associates of CA A Medical Corporation: 15,507 individuals, Sep 2022.
Resource Anesthesiology Associates of CA A Medical Corporation reported a breach of unsecured protected health information to the HHS Office for Civil Rights on 23 September 2022. The filing records the organisation as a healthcare provider in California and lists 15,507 individuals affected, which makes it the 203rd largest of the 776 California filings on the register and the 274th largest of the 718 filings submitted nationally in 2022. Among the 53 California filings made in 2022 it ranks 20th.
Individuals affected
15,507
As reported to HHS
Modelled cost (IBM 2025)
$2.48M
Method shown, not disclosed
Rank in CA
203rd
of 776 California filings
Rank in 2022
274th
of 718 filings nationally
Section F.1 / The filing
As posted by HHS OCR
Every value below is the portal's own field for this filing, plus its rank within the register.
- Covered entity type
- Healthcare Provider
- Individuals affected
- 15,507
- Breach submission date
- 23 September 2022
- Submission year
- 2022
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- State
- California (CA)
- Portal status
- listed in the HHS OCR breach portal archive
- Rank in California by size
- 203rd of 776
- Rank in 2022 nationally
- 274th of 718
- California median filing
- 3,553 individuals
- Register id (derived)
- CA-20220923-resource-anesthesiology-associates-of-ca
Section F.2 / In context
Where this filing sits in California and in 2022
OCR classifies the incident as a hacking or IT incident, with the breached information held in a network server. Hacking/IT Incident is the type recorded on 398 of the 776 California filings (51%) and on 79% of all filings submitted in 2022. Network Server appears on 43% of California filings.
No business associate is recorded on the filing; 33% of California filings do involve one. At 15,507 individuals the breach is 4.4 times the California median filing of 3,553 and 3.9 times the national median of 4,000 across all 7,884 filings. It sits in the 10,000 to 99,999 band, which holds 1,938 filings.
As of 28 August 2026 the case is listed in the HHS OCR breach portal archive. OCR's closing summary of the case is reproduced in full below.
California's breach notification statute (Cal. Civ. Code 1798.82) requires notice to affected residents within 30 calendar days of discovery (effective 1 January 2026, SB 446). Its attorney general threshold: more than 500 California residents. The HIPAA Breach Notification Rule ran alongside it: notice to affected individuals and to HHS without unreasonable delay and no later than 60 days after discovery, which is the clock that put this filing on the portal.
Multiplying 15,507 individuals by IBM's $160 customer-PII cost per record (Cost of a Data Breach 2025, the figure the site's calculator uses) gives a modelled $2.48M; the 2026 edition's $192 gives $2.98M. Both are modelled estimates with the method shown, not costs disclosed by Resource Anesthesiology Associates of CA A Medical Corporation. For scale, IBM's 2026 average cost of a healthcare breach is $6.64M, so this filing models at 0.4 times the sector average.
Section F.3 / OCR closing summary
The portal's archived description, in full
Written by the Office for Civil Rights when the case was closed and reproduced verbatim from the HHS export.
The covered entity (CE), Resource Anesthesiology Associates of California, reported that its business associate (BA) experienced a ransomware attack affecting the protected health information (PHI) of 15,507 individuals. The PHI involved included names, addresses, dates of birth, drivers' license and Social Security numbers, claims and financial information, diagnoses, medications, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice. In its mitigation efforts, complimentary credit monitoring services were provided and the BA implemented additional administrative, technical, and security safeguards to better protect sensitive data.
Section F.5 / Modelled cost
15,507 individuals through IBM's per-record figures
Modelled cost / method shown, not a disclosed cost
ModelledIBM 2025 customer PII, $160 per record
$2.48M
15,507 x $160
IBM 2026 customer PII, $192 per record
$2.98M
15,507 x $192
Method: individuals affected, as reported by Resource Anesthesiology Associates of CA A Medical Corporation to HHS, multiplied by IBM's customer-PII cost per record (Cost of a Data Breach 2025 Figure 6 and the 2026 edition). No cost has been disclosed by the entity for this filing; the figure is a planning estimate, not a fact about the breach. IBM's per-record figures come from mid-volume breaches and IBM cautions against applying them to breaches involving millions of records; the site's per-record page explains where the multiplication holds and where it breaks down.
Context: IBM's average cost of a healthcare breach is $6.64M in the 2026 report ($7.42M in 2025); the global average across all sectors was $4.44M in 2025.
Cost per record: method and limits / Healthcare breach cost, IBM 2026
Section F.6 / Notification clock
California statute and the HIPAA rule
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 F.7 / Peer filings
California filings closest in size
Neighbours by size rank among California filings in 2022, topped up from other years where 2022 has too few. Filings of 10,000 or more link to their own page.
| Covered entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|
| Motion Picture Industry Pension & Health Plans | Health Plan | 16,838 | 11 May 2022 | |||
| County of Kings, State of California | Healthcare Provider | 16,590 | 21 Jan 2022 | |||
| CCA Health Plans of California, Inc. f/k/a Vitality Health Plan of California, Inc. | Health Plan | 14,631 | 15 Nov 2022 | |||
| Work Health Solutions | Healthcare Provider | 13,157 | 9 Nov 2022 |
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. This row: hhs-breach-archive__2026-08-28.csv, export row 2216.
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.