Vendor History

Medical and dental practice software

Change Healthcare (UnitedHealth Group) security incident history

Updated . Data gathered daily from official public sources.

As of Oct 26, 2026, Vendor History found 2 state breach notices and 3 SEC cyber filings for Change Healthcare (UnitedHealth Group), dated Feb 22, 2024 to Aug 3, 2024. The most recent breach notice or SEC filing was on Aug 3, 2024. Sources checked: the California and Washington Attorney General breach lists and SEC EDGAR (Form 8-K, Item 1.05).

Breach notices and SEC cyber filings

  1. Breach notice

    Change Healthcare Inc. filed a data breach notice with the California Attorney General. Breach date(s) listed: 02/12/2024, 02/22/2024.

    Source: California Attorney General

  2. Breach notice

    Change Healthcare Inc. filed a data breach notice with the Washington Attorney General. Cause listed: Cyberattack: Ransomware. Washington residents affected: 3,121,209.

    Source: Washington Attorney General (record) · all Washington notices

  3. SEC cyber filing

    UnitedHealth Group (parent company) filed a Form 8-K/A with the SEC under Item 1.05, which is used to report a material cybersecurity incident.

    Source: SEC EDGAR

  4. SEC cyber filing

    UnitedHealth Group (parent company) filed a Form 8-K/A with the SEC under Item 1.05, which is used to report a material cybersecurity incident.

    Source: SEC EDGAR

  5. SEC cyber filing

    UnitedHealth Group (parent company) filed a Form 8-K with the SEC under Item 1.05, which is used to report a material cybersecurity incident.

    Source: SEC EDGAR

Got a breach letter from Change Healthcare (UnitedHealth Group)? What to do when a vendor has a data breach.

We check: California and Washington Attorney General breach notices, SEC cyber incident filings (Form 8-K, Item 1.05) and CISA's catalog of actively exploited security flaws. An empty section means we found nothing in those sources. It does not mean nothing happened. How it works

To cite: Vendor History, "Change Healthcare (UnitedHealth Group) security incident history," vendorhistory.com/vendor/change-healthcare, data checked Oct 26, 2026. Free to reuse under CC BY 4.0 with credit to Vendor History.