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HHS OCR report · 2023

Deanco Healthcare LLC dba Mission Community Hospital data breach

Deanco Healthcare LLC dba Mission Community Hospital, a healthcare provider in California, reported a breach affecting 269,847 individuals to HHS OCR on Jun 30, 2023.

OCR report facts

Covered entity
Deanco Healthcare LLC dba Mission Community Hospital
Entity type
Healthcare Provider
State
California
Individuals affected
269,847
Submission date
Jun 30, 2023
Type of breach
Hacking/IT Incident
Location of breached information
Network Server
Business associate present
No
Status
Archive (closed)

OCR description

The covered entity (CE), Deanco Healthcare dba Mission Community Hospital, reported that it experienced a ransomware incident that affected the protected health information (PHI) of 269,847 individuals. The PHI involved included names, dates of birth, drivers’ license information, Social Security numbers, claims information, diagnoses, medications, and other treatment information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In response to...

Text as published on the HHS OCR breach portal.

Frequently asked questions

How many people were affected by the Deanco Healthcare LLC dba Mission Community Hospital data breach?

The report to HHS OCR lists 269,847 individuals affected.

When was it reported to HHS?

It was submitted to HHS OCR on Jun 30, 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 Deanco Healthcare LLC dba Mission Community Hospital 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 Deanco Healthcare LLC dba Mission Community Hospital.