Missouri Department of Mental Health
Disclosed Oct 24, 20189,000 affectedConfirmed
The Missouri Department of Mental Health, the covered entity (CE), discovered that a former private contractor of its business associate (BA), had placed private client data in an unsecured cloud storage portal. The breach lasted from March 17, 2018, through August 31, 2018, and affected approximately 9,000 individuals. The CE notified all affected individuals, the media, and OCR. The CE mitigated the effects of the breach by confirming that the data had been removed from the cloud storage portal and obtained written verification from all parties involved in identifying the breach that they had either destroyed the data, securely returned the data, or that they are securely retaining the data for chain of custody purposes. During the investigation, OCR provided the CE with technical assistance regarding the risk analysis and risk management provisions of the Security Rule.
What is known
| People affected | 9,000 (as reported to HHS) |
|---|---|
| Disclosed | Oct 24, 2018 |
| Attack | Insider |
| Data exposed | NamesHealth |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
Notices filed
Other breaches at Missouri Department of Mental Health
History of this record
First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.