HHS OCR report · 2023
Mt. Graham Regional Medical Center data breach
OCR report facts
- Covered entity
- Mt. Graham Regional Medical Center
- Entity type
- Healthcare Provider
- State
- Arizona
- Individuals affected
- 35,688
- Submission date
- Sep 29, 2023
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
Mount Graham Regional Medical Center, the covered entity (CE), reported that it experienced a ransomware attack that compromised the protected health information (PHI) of 35,688 individuals. The PHI involved included names, addresses, Social Security and drivers’ license numbers, birthdates, financial information, and treatment information. In its mitigation efforts, the CE implemented additional administrative, technical, and security safeguards to better protect sensitive data.
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Mt. Graham Regional Medical Center data breach?
The report to HHS OCR lists 35,688 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Sep 29, 2023.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Network Server.
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 Mt. Graham Regional Medical Center 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 Mt. Graham Regional Medical Center.