- State
- MD
- Covered entity type
- Healthcare Provider
- Individuals affected
- 310,405
- Business associate present
- No
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- First seen by InfoSec Signals
- 9/23/2026
- Last seen in OCR export
- 9/23/2026
OCR description
John Hopkins Medicine, the covered entity (CE), reported that it experienced a malware attack that compromised the protected health information (PHI) of 310,405 individuals. The PHI involved included names, addresses, birthdates, diagnoses, Social Security numbers, and claims information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In its mitigation efforts, the CE provided complimentary credit monitoring services and implemented additional administrative and technical safeguards.
Change history
- 9/23/2026Added to OCR's archive list
Source: U.S. Department of Health and Human Services, Office for Civil Rights, Breach Portal. Records are reproduced as published; entity names and figures are OCR's.