- State
- MD
- Covered entity type
- Healthcare Provider
- Individuals affected
- 172,915
- Business associate present
- Yes
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- First seen by InfoSec Signals
- Sep 23, 2026
- Last seen in OCR export
- Oct 25, 2026
OCR description
The covered entity (CE), MedStar St. Mary’s Hospital, reported that its business associate (BA) reported that it was the subject of a cybersecurity attack that affected the protected health information (PHI) of 172,915 individuals. The PHI involved included names, addresses, dates of birth, drivers’ license and Social Security numbers, diagnoses/conditions, lab results, medications, and health insurance information. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE and BA provided complimentary credit monitoring services to the affected individuals and implemented additional safeguards to better protect PHI.
Change history
- Sep 23, 2026Added to OCR's archive list
Source: HHS OCR Breach Portal, U.S. Department of Health and Human Services, Office for Civil Rights about this source
Records are reproduced as published; entity names and figures are OCR's.