HHS OCR report ยท 2023
Centers for Medicare & Medicaid Services data breach
OCR report facts
- Covered entity
- Centers for Medicare & Medicaid Services
- Entity type
- Health Plan
- State
- Maryland
- Individuals affected
- 10,011
- Submission date
- Apr 7, 2023
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Paper/Films
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), Centers for Medicare & Medicaid Services, reported that an employee of its business associate (BA) inadvertently mailed the protected health information (PHI) of 10,011 individuals to the wrong recipients. The PHI involved included names, addresses, claims information, diagnoses, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice. In response to the breach, the BA implemented additional administrative ...
Text as published on the HHS OCR breach portal.
Other reports by Centers for Medicare & Medicaid Services
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| Centers for Medicare & Medicaid Services | MD | Health Plan | 107,154 | Jun 30, 2025 | Hacking/IT Incident | Under investigation |
| Centers for Medicare & Medicaid Services | MD | Health Plan | 3,112,815 | Sep 6, 2024 | Hacking/IT Incident | Archive (closed) |
| Centers for Medicare & Medicaid Services | MD | Health Plan | 2,342,357 | Jul 28, 2023 | Hacking/IT Incident | Archive (closed) |
Frequently asked questions
How many people were affected by the Centers for Medicare & Medicaid Services data breach?
The report to HHS OCR lists 10,011 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Apr 7, 2023.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Paper/Films.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from Centers for Medicare & Medicaid Services legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or Centers for Medicare & Medicaid Services.