HHS OCR report · 2018
Contra Costa Health Plan data breach
OCR report facts
- Covered entity
- Contra Costa Health Plan
- Entity type
- Health Plan
- State
- California
- Individuals affected
- 862
- Submission date
- Dec 13, 2018
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Electronic Medical Record, Email
- Business associate present
- No
- Status
- Archive (closed)
OCR description
On May 22, 2018, the covered entity (CE), Contra Costa Health Plan, discovered that a business associate (BA) had provided services under a false identity. The CE investigated and determined that during her work for the CE the BA had access to 862 health plan enrollees’ protected health information (PHI), including demographic and clinical information. Following the breach, the CE immediately terminated the BA contract and the individual contractor’s access to the CE’s records. The CE cond...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Contra Costa Health Plan data breach?
The report to HHS OCR lists 862 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Dec 13, 2018.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Electronic Medical Record, Email.
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 Contra Costa Health Plan 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 Contra Costa Health Plan.