AHMC Healthcare, Inc and affiliated hospitals
Disclosed Oct 21, 201312 years ago729,000 affectedConfirmed
Two unencrypted laptop computers containing the protected health information (PHI) of 729,000 individuals were stolen from a secure office on October 23, 2013. The types of PHI involved in the breach included financial information, diagnoses, conditions, treatment information, and demographic information. The covered entity (CE), AHMC, provided breach notification to HHS, affected individuals, and the media. Following the breach, the CE implemented and maintained an encryption plan. It also developed policies and procedures regarding access to and receipt and removal of electronic PHI (ePHI). It also improved safeguards to reduce risks and vulnerabilities to ePHI. As a result of this investigation, OCR provided technical assistance to the CE regarding its obligations to implement and maintain policies and procedures that comply with the Privacy and Security Rules, conduct an accurate and thorough risk analysis, and implement a risk management plan. OCR also provided technical assistance regarding encryption.
What is known
| People affected | 729,000 (as reported to HHS) |
|---|---|
| Disclosed | Oct 21, 2013 |
| Happened | Oct 12, 2013 |
| Attack | Lost or stolen device |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: AHMC Healthcare, Inc and affiliated hospitalsoag.ca.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): AHMC Healthcare Inc. and affiliated Hospitals (Healthcare Provider, CA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| California AGresidents of CA | Oct 21, 2013 | |
| HHS archivetotal | Oct 25, 2013 | 729,000 |
History of this record
- 2026-09-25 · attack: unknown to lost-device · backfill source
- 2026-09-25 · data_types: [] to ["names","health"] · backfill source
- 2026-09-25 · records_basis: empty to hhs · backfill source
- 2026-09-25 · records: empty to 729000 · backfill source
- 2026-09-25 · summary: empty to Two unencrypted laptop computers containing the protected health information (PHI) of 729,000 individuals were stolen from a secure office on October 23, 2013. The types of PHI involved in the breach included financial information, diagnose · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.
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