How many data breaches has Blue Shield of California had?

Blue Shield of California has been involved in 6 reported healthcare data breaches affecting a total of 4,704,230 patients. The earliest breach was reported in 2025 and the most recent in 2025.

Was I affected by a Blue Shield of California data breach?

If you received healthcare services from Blue Shield of California, you may have been affected by one of their 6 reported breaches. Check your mail for breach notification letters, review your medical records for unauthorized changes, and use our breach checker tool to search for specific incidents.

How many data breaches has Blue Shield of California had?

Blue Shield of California has been involved in 6 reported healthcare data breaches affecting a total of 4,704,230 patients. The earliest breach was reported in 2025 and the most recent in 2025. Breach types include: Unauthorized Access/Disclosure, Hacking/IT Incident.

Was my data affected by the Blue Shield of California breach?

If you were a patient of Blue Shield of California during the breach period, your data may have been compromised. Check your mail for breach notification letters. You can also contact Blue Shield of California directly or file a records request to verify what data was accessed.

What data was exposed in the Blue Shield of California breach?

Healthcare data breaches can expose names, dates of birth, Social Security numbers, medical records, insurance information, and financial data. The specific data types vary by incident. Review the breach notification from Blue Shield of California for details on what was compromised.

Can I sue Blue Shield of California for a data breach?

Whether you can bring or join a claim depends on the incident, governing law, documented harm, filing deadlines, and any court-approved settlement terms. Review current court materials and consult a licensed healthcare data breach attorney for advice about your circumstances.

How many data breaches has Blue Shield of California had?

Blue Shield of California has been involved in 6 reported healthcare data breaches affecting a total of 4.7M patients. The earliest breach was reported in 2025 and the most recent in 2025. Breach types include: Unauthorized Access/Disclosure, Hacking/IT Incident. If you received care from Blue Shield of California, review the timeline below to check if your data may have been compromised.

Blue Shield of California Data Breaches (6 Incidents)

2025

Blue Shield of California

2025-09-29 · California

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607 affectedUnauthorized Access/DisclosurePaper/Films

The specific data types exposed likely include: member names, addresses, and contact information; member identification numbers and policy numbers; dates of birth and potentially Social Security numbers; medical information and health history details; insurance claims information and billing records; provider information and treatment details; potentially financial account information if claims processing records were involved; and any other personal health information contained in the paper or film records accessed.

Blue Shield of California

2025-07-21 · California

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783 affectedUnauthorized Access/DisclosureLaptop, Network Server, Other

Protected health information (PHI) likely exposed includes: names, addresses, phone numbers, dates of birth, Social Security numbers, health insurance member identification numbers, policy numbers, claims history, medical history information, diagnosis codes, prescription information, provider information, payment information, and potentially banking or financial account details. The specific combination of data exposed depends on what information was stored on the compromised laptop and network server systems.

Blue Shield of California

2025-06-23 · California

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673 affectedUnauthorized Access/DisclosureEmail

Protected health information (PHI) likely exposed through email access may include: member names, dates of birth, member identification numbers, Social Security numbers (if stored in email systems), health insurance policy information, claims history and details, medical service dates and providers, diagnosis codes and treatment information, prescription information, financial account details related to insurance coverage, email addresses, phone numbers, and potentially other personal identifiers. The specific data types depend on what information was stored in or transmitted through the compromised email accounts.

Blue Shield of California

2025-06-06 · California

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2K affectedUnauthorized Access/DisclosureOther

While the specific data elements were not detailed in the breach submission, unauthorized access incidents at health insurance carriers typically expose: member names, dates of birth, Social Security numbers, health insurance member ID numbers, policy information, medical history and diagnoses, prescription information, provider names and treatment details, claim information, financial account information, and potentially banking details for premium payments or claim reimbursements. The exact scope of exposed data depends on what information was accessible through the compromised access point or business associate system.

Blue Shield of California

2025-04-09 · California

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4.7M affectedHacking/IT IncidentNetwork Server

- Names and date of birth - Social Security numbers - Health insurance member identification numbers - Policy and coverage information - Medical history and health conditions - Prescription information - Provider and facility information - Billing and payment information - Bank account and financial account details - Addresses and contact information - Employment information - Potentially claims history and treatment details

Blue Shield of California

2025-02-28 · California

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624 affectedUnauthorized Access/DisclosureElectronic Medical Record

Protected Health Information (PHI) stored within Blue Shield's Electronic Medical Record system, likely including: patient names, dates of birth, medical record numbers, health insurance member identification numbers, diagnoses and medical conditions, treatment plans and clinical notes, medication records and prescriptions, laboratory and imaging results, healthcare provider information, dates of service, and potentially Social Security numbers or other identifiers used in the medical record system. The specific subset of data elements accessed by unauthorized users may vary depending on the scope of the access incident.

Blue Shield of California Data Breach History

How many data breaches has Blue Shield of California had?

Breach Timeline

Related resources

Blue Shield of California Data Breach History

How many data breaches has Blue Shield of California had?

Breach Timeline

Related resources