Back to the register

Prospect Medical Holdings, Inc.

ArchivedSubmitted 09/29/2023

Updated 14 hours ago ()

State
CA
Covered entity type
Business Associate
Individuals affected
1,309,096
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), Prospect Medical Holdings, reported that it experienced a ransomware incident that affected the protected health information (PHI) of 1,309,096 individuals. The PHI involved included names, dates of birth, drivers’ license and Social Security numbers, addresses, diagnoses, lab results, medications, claims and financial information, and other treatment information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In response to the breach, the CE offered free credit monitoring and identity theft protection services and implemented new administrative and technical safeguards.

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.

Your cookie choices
We use essential cookies to run this site, and, only with your consent, an advertising cookie from Google to measure whether our ads lead to sign-ups and subscriptions. See our for details.