HHS OCR report ยท 2024
Medical Management Resource Group, L.L.C. data breach
OCR report facts
- Covered entity
- Medical Management Resource Group, L.L.C.
- Entity type
- Business Associate
- State
- Arizona
- Individuals affected
- 2,264,157
- Submission date
- Feb 6, 2024
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The business associate (BA), Medical Management Resource Group, reported that it experienced a cyber-attack that affected the protected health information (PHI) of 2,264,157 individuals. The PHI involved included names, dates of birth, addresses, diagnoses, medications, and claims and financial information. The BA notified HHS, affected individuals, and the media. In response to the breach, the BA provided complimentary credit monitoring services and implemented new technical safeguards.
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Medical Management Resource Group, L.L.C. data breach?
The report to HHS OCR lists 2,264,157 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Feb 6, 2024.
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 Medical Management Resource Group, L.L.C. 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 Medical Management Resource Group, L.L.C..