Blue Cross Blue Shield Data Breach History
WebsiteBlueCross BlueShield of Tennessee is a not-for-profit health insurer serving 3.4 million members across 14,000 employer groups with medical, Medicare, and Medicaid plans.
This page shows all data breaches of Blue Cross Blue Shield. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All Blue Cross Blue Shield Breaches
- 2012 2012 — Blue Cross Blue Shield: Location of breached information: Unauthorized… 500 records Share
- 2010 2010 — Blue Cross Blue Shield of Tennessee: A thief stole 57 hard drives from the closet of a… 1.0M records Share
- 2009 2009 — 1M records Unknown records Share
- 2009 2009 — Blue Cross Blue Shield: US health insurance organization, 1.0M records 1.0M records Share
- 2009 2009 — BlueCross BlueShield of Tennessee: Lost / stolen device, 1023209 records 1.0M records Share
Blue Cross Blue Shield Data Breach Summary
This page tracks the Blue Cross Blue Shield data breach history and cybersecurity incidents affecting Blue Cross Blue Shield (United States). BreachHistory currently indexes 7 publicly disclosed or catalogued incidents spanning 2008 through 2012, with approximately 4.1 million records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.
The Blue Cross Blue Shield breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.
Largest Blue Cross Blue Shield Data Breaches
The largest indexed incidents include the 2010 — Blue Cross Blue Shield of Tennessee: A thief stole 57 hard drives from the …, the 2009 — Blue Cross Blue Shield: US health insurance organization, 1.0M records, and the 2009 — BlueCross BlueShield of Tennessee: Lost / stolen device, 1023209 records, along with additional historical incidents involving exposed passwords, public databases, and large-scale data scraping. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Blue Cross Blue Shield or a regulator. Below is the list of large data breaches:
- 2010 2010 — Blue Cross Blue Shield of Tennessee: A thief stole 57 hard drives from the closet of a… — about 1.0M records exposed · Catalogued incident
- 2009 2009 — Blue Cross Blue Shield: US health insurance organization, 1.0M records — about 1.0M records exposed · Catalogued incident
- 2009 2009 — BlueCross BlueShield of Tennessee: Lost / stolen device, 1023209 records — about 1.0M records exposed · Catalogued incident
- 2009 2009 — Blue Cross Blue Shield of Tennessee: A thief stole 57 hard drives from the closet of a… — about 1.0M records exposed · Catalogued incident
- 2008 2008 — Blue Cross Blue Shield: A document containing the personal data was… — about 1.7K records exposed · Catalogued incident
- 2012 2012 — Blue Cross Blue Shield: Location of breached information: Unauthorized… — about 500 records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include email addresses, names, physical addresses, health and medical (PHI) records, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
Blue Cross Blue Shield Data Breach 2026
At the time of this update, no Blue Cross Blue Shield data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.
What To Do If You Were Affected
If you believe your account may have been involved in a Blue Cross Blue Shield data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.
This Blue Cross Blue Shield breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.