Excellus BlueCross BlueShield Data Breach History
WebsiteExcellus BlueCross BlueShield is a New York health insurer serving upstate New York.
This page shows all data breaches of Excellus BlueCross BlueShield. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All Excellus BlueCross BlueShield Breaches
- 2015 2015 — Excellus BlueCross BlueShield: Dec 2013–Aug 2015 (disclosed Sep 2015), 10.0M records 10.0M records Share
- 2015 2015 — Excellus BlueCross BlueShield: Hacking, 10000000 records 10.0M records Share
Excellus BlueCross BlueShield Data Breach Summary
This page tracks the Excellus BlueCross BlueShield data breach history and cybersecurity incidents affecting Excellus BlueCross BlueShield (United States). BreachHistory currently indexes 2 publicly disclosed or catalogued incidents spanning 2015, with approximately 20.0 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 Excellus BlueCross BlueShield 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, while 1 remain unverified claims pending independent verification.
Largest Excellus BlueCross BlueShield Data Breaches
The largest indexed incidents include the 2015 — Excellus BlueCross BlueShield: Dec 2013 — Aug 2015 (disclosed Sep 2015), 10… and the 2015 — Excellus BlueCross BlueShield: Hacking, 10000000 records. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Excellus BlueCross BlueShield or a regulator. Below is the list of large data breaches:
- 2015 2015 — Excellus BlueCross BlueShield: Dec 2013–Aug 2015 (disclosed Sep 2015), 10.0M records — about 10.0M records exposed · Unverified claim
- 2015 2015 — Excellus BlueCross BlueShield: Hacking, 10000000 records — about 10.0M records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include Social Security numbers and national IDs, phone numbers, names, physical addresses, health and medical (PHI) records, dates of birth, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
Excellus BlueCross BlueShield Data Breach 2026
At the time of this update, no Excellus BlueCross BlueShield 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 Excellus BlueCross BlueShield 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 Excellus BlueCross BlueShield 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.