HHS OCR report · 2018
Missouri Dept. of Mental Health data breach
OCR report facts
- Covered entity
- Missouri Dept. of Mental Health
- Entity type
- Healthcare Provider
- State
- Missouri
- Individuals affected
- 1,000
- Submission date
- Feb 21, 2018
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Other
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The covered entity (CE), Missouri Dept. of Mental Health, erroneously mailed letters to family members of individuals receiving services, affecting 1,000 individuals. The protected health information (PHI) involved in the breach included consumers' names. Following the breach, the CE implemented additional safeguarding and quality control procedures for mailings. The CE provided notice of the breach to affected individuals, the media, and to HHS. As a result of OCR’s investigation, the CE up...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Missouri Dept. of Mental Health data breach?
The report to HHS OCR lists 1,000 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Feb 21, 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: Other.
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 Missouri Dept. of Mental Health 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 Missouri Dept. of Mental Health.