✅ Official notice on file. San Bernardino County on behalf of Arrowhead Regional Medical Center filed this data breach notice with the California Attorney General on Sep 28, 2026. Compare it with the letter you received: the official copy is linked below.
San Bernardino County on behalf of Arrowhead Regional Medical Center reported a data breach caused by unauthorized access to its computer network.
Key facts
| Discovered | Aug 28, 2026 |
|---|---|
| Incident type | Network intrusion |
| Reported to California AG | Sep 28, 2026 |
| Company helpline | 1-866-566-1941 |
Free credit monitoring
San Bernardino County on behalf of Arrowhead Regional Medical Center is offering 12 months of Experian IdentityWorks at no cost to people who received the letter. Enroll at www.experianidworks.com/1Bcredit using the activation code printed on your letter. Deadline to enroll: Dec 31, 2026.
What to do now
- Get your free credit reports at AnnualCreditReport.com and look for accounts you do not recognize.
- Call the San Bernardino County on behalf of Arrowhead Regional Medical Center helpline at 1-866-566-1941 if you have questions about your letter.
Timeline
- Aug 28, 2026 — San Bernardino County on behalf of Arrowhead Regional Medical Center discovers the incident
- Sep 28, 2026 — Breach reported to the California Attorney General
Other recent data breaches
- BASS Medical Group data breach
- Modoc Medical Center data breach
- Ridgeway Pharmacy Ltd data breach
- Paradigm Healthcare Services data breach
- Catalyst Physician Group data breach
Source: notification letter and filing submitted by San Bernardino County on behalf of Arrowhead Regional Medical Center to the California Attorney General. BreachLetter is not affiliated with San Bernardino County on behalf of Arrowhead Regional Medical Center. Details extracted from the official letter; always follow the instructions in your own copy.