Centers for Medicare & Medicaid Services Data Breach History
WebsiteThe Centers for Medicare & Medicaid Services (CMS) is the federal agency that administers Medicare, Medicaid, CHIP, and the Health Insurance Marketplace for over 160 million Americans.
This page shows all data breaches of Centers for Medicare & Medicaid Services. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All Centers for Medicare & Medicaid Services Breaches
- 2018 2018 — Centers for Medicare & Medicaid Services: Hacking, 75000 records 75.0K records Share
Centers for Medicare & Medicaid Services Data Breach Summary
This page tracks the Centers for Medicare & Medicaid Services data breach history and cybersecurity incidents affecting Centers for Medicare & Medicaid Services (Unknown). BreachHistory currently indexes 1 publicly disclosed or catalogued incident spanning 2018, with approximately 75 thousand 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 Centers for Medicare & Medicaid Services 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 Centers for Medicare & Medicaid Services Data Breaches
The largest indexed incidents include the 2018 — Centers for Medicare & Medicaid Services: Hacking, 75000 records. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Centers for Medicare & Medicaid Services or a regulator. Below is the list of large data breaches:
- 2018 2018 — Centers for Medicare & Medicaid Services: Hacking, 75000 records — about 75.0K records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include 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.
Centers for Medicare & Medicaid Services Data Breach 2026
At the time of this update, no Centers for Medicare & Medicaid Services 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 Centers for Medicare & Medicaid Services 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 Centers for Medicare & Medicaid Services 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.