# Acadia Healthcare reports data security incident

_Friday, June 26, 2026 at 6:15 PM EDT · Cybersecurity · Latest · Tier 2 — Notable_

Acadia Healthcare Company, Inc. reported a data security incident that involved patient information. The company detected unusual activity in a user's email account on March 25, 2026. It secured the account and launched an investigation with the assistance of a third-party forensic investigation firm.

An unauthorized party gained access through social engineering to one email account and an associated SharePoint account. Between March 21, 2026 and March 25, 2026 the party accessed and acquired certain emails and SharePoint files. The investigation confirmed the incident was limited to that account and associated SharePoint account and did not involve electronic health record systems or disrupt operations or patient care.

A review identified files containing patient information including names, addresses, dates of birth, treatment information, dates of treatment, type of treatment and health insurance information. For some individuals the files also contained their Medicare Health Insurance Claim Number which may include their Social Security number.

Beginning on May 22, 2026 Acadia began notifying patients whose information was involved. The company established a toll-free incident response line at 888-500-5708. The line operates from 9 a.m. to 9 p.m. Eastern Time Monday through Friday excluding major U.S. holidays.

The company recommends that affected patients review any statements they receive from healthcare providers and health insurance plans. Patients should contact the provider or plan immediately if they see any services that were not received. Acadia said it is committed to protecting the confidentiality and security of the information it maintains and has implemented additional safeguards to further protect its systems.

## Sources

- [Acadia Healthcare](https://www.acadiahealthcare.com/notice-of-data-security-incident/)

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