- State
- MO
- Covered entity type
- Healthcare Provider
- Individuals affected
- 537
- Business associate present
- No
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- First seen by InfoSec Signals
- 9/23/2026
- Last seen in OCR export
- 9/23/2026
OCR description
The covered entity (CE), Missouri Department of Mental Health, reported that an employee erroneously sent an unencrypted email message containing the protected health information (PHI) of 537 individuals to the wrong individuals. The PHI involved included names, Social Security numbers, addresses, and dates of birth. The CE notified HHS, affected individuals, and the media. In response to the breach, the CE implemented additional administrative, technical, and security safeguards. Staff were retrained.
Change history
- 9/23/2026Added to OCR's archive list
Source: U.S. Department of Health and Human Services, Office for Civil Rights, Breach Portal. Records are reproduced as published; entity names and figures are OCR's.