Johns Hopkins Medicine
Disclosed Jul 25, 20233 years ago310,405 affectedConfirmed
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.
What is known
| People affected | 310,405 (as reported to HHS) |
|---|---|
| Disclosed | Jul 25, 2023 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| HHS OCR breach report (archive, resolved): Johns Hopkins Medicine (Healthcare Provider, MD)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| HHS archivetotal | Jul 25, 2023 | 310,405 |
History of this record
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.