DisclosureLens
Social EngineeringHealthcareHealthcarePhishingData ExfiltratedCustomer Data InvolvedHealth (basic)Identity (basic)LowContained

ACADIA HEALTHCARE COMPANY, INC.

bd_63ceafab8c51b441 · schema v1 · pii pii-v1

Severity

Low

Discovered

Mar 25, 2026

Filed

May 22, 2026

To disclose

8 weeks

Affected

405state residents only

Confidence

65%
Full breach record for ACADIA HEALTHCARE COMPANY, INC. →2 incidents on file

Acadia Healthcare Company, Inc. disclosed a data security incident involving unauthorized access to a single email and SharePoint account via social engineering/phishing between March 21 and March 25, 2026. The incident exposed patient names, admission dates, diagnosis codes, and patient status. The company secured the accounts, engaged forensic investigators, and is providing cybersecurity training. No EHR systems were affected.

Massachusetts clock⏱ MA AG >30d8 weeks discovery → filing

Incident timeline

undetected · 4 days
discovery → filing · 8 weeks / 58 days

Mar 21, 2026

Begins

Mar 25, 2026

Discovered

May 22, 2026

Filed

vs. sector median

3 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed405 affectedView incident

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.