Marin Cancer Care
ent_5e746fa514a722a6b58a2c84
Disclosures
3
State AG · HHS OCR · 2 jurisdictions
Incidents
1
filings grouped by incident
Max affected reported
501
nationwide · HHS OCR CA
Leak-site claims
0
none in sample
Identity resolution
- Canonical name
- Marin Cancer Care
- Normalized
- marin cancer care— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- No match
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- None on record
Disclosure history (3)newest first
- 🐻California State AGas victim2026-04-23
Marin Cancer Care notified the California Attorney General of an unauthorized access incident. The organization learned of the breach on December 8, 2025, after investigators identified unauthorized network access between November 22, 2025, and December 6, 2025. Files were copied from the network. Affected data may include names, addresses, phone numbers, email addresses, Social Security numbers, dates of birth, medical record numbers, diagnoses, treatments, and health insurance information. The company engaged third-party investigators, reviewed affected files, and is providing complimentary identity monitoring to affected individuals. No ransomware or specific threat actor was identified.
- 🍁Vermont State AGas victim2026-04-23
Marin Cancer Care reported a data breach to the Vermont Attorney General. The breach was reported to the AGO on 2026-04-23. The reporting organization type is Health Care. 2 Vermont residents were affected. Categories of data breached: Health Records.
- CALIFORNIAHHS OCRas victim2026-02-06
Marin Cancer Care reported to HHS on 2026-02-06 a Hacking/IT Incident affecting 501 individuals. Breached information located on Network Server.