Vendor History

All vendors

Medical and dental practice software

Updated . Data gathered daily from official public sources.

As of Oct 26, 2026, Vendor History found breach notices or SEC cyber filings for 5 of the 7 vendors it tracks in this category: Change Healthcare (5), Henry Schein (3), Veradigm (3), NextGen Healthcare (2) and Oracle Health (2), dated May 3, 2023 to Dec 18, 2025. Finding nothing in these sources does not mean nothing happened.

The 7 vendors we track in this category. Data checked Oct 26, 2026.
VendorState breach noticesSEC cyber filingsExploited flawsLatest notice or filing
athenahealth000None found
Change Healthcare (UnitedHealth Group)230Aug 3, 2024
eClinicalWorks000None found
Henry Schein (Dentrix)300Oct 23, 2024
NextGen Healthcare200May 5, 2023
Oracle Health (Cerner)200Jul 25, 2025
Veradigm (Allscripts)300Dec 18, 2025

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Breach notices and SEC filings in this category

  1. Breach noticeVeradigm (Allscripts)

    Veradigm LLC filed a data breach notice with the California Attorney General. Breach date(s) listed: 12/15/2024.

    Source: California Attorney General

  2. Breach noticeVeradigm (Allscripts)

    Veradigm LLC filed a data breach notice with the Washington Attorney General. Cause listed: Unauthorized Access. Washington residents affected: 845.

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

  3. Breach noticeVeradigm (Allscripts)

    Veradigm LLC filed a data breach notice with the California Attorney General. Breach date(s) listed: 12/15/2025.

    Source: California Attorney General

  4. Breach noticeOracle Health (Cerner)

    Cerner Corporation filed a data breach notice with the California Attorney General. Breach date(s) listed: 01/22/2025.

    Source: California Attorney General

  5. Breach noticeOracle Health (Cerner)

    Cerner Corporation filed a data breach notice with the Washington Attorney General. Cause listed: Unauthorized Access. Washington residents affected: 69,238.

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

  6. Breach noticeHenry Schein (Dentrix)

    Henry Schein, Inc. filed a data breach notice with the California Attorney General.

    Source: California Attorney General

  7. Breach noticeChange Healthcare (UnitedHealth Group)

    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

  8. Breach noticeChange Healthcare (UnitedHealth Group)

    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

  9. SEC cyber filingChange Healthcare (UnitedHealth Group)

    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

  10. SEC cyber filingChange Healthcare (UnitedHealth Group)

    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

  11. SEC cyber filingChange Healthcare (UnitedHealth Group)

    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

  12. Breach noticeHenry Schein (Dentrix)

    Henry Schein, Inc. filed a data breach notice with the Washington Attorney General. Cause listed: Cyberattack: Ransomware. Washington residents affected: 1,953.

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

  13. Breach noticeHenry Schein (Dentrix)

    Henry Schein, Inc. filed a data breach notice with the California Attorney General.

    Source: California Attorney General

  14. Breach noticeNextGen Healthcare

    NextGen Healthcare, Inc. filed a data breach notice with the California Attorney General. Breach date(s) listed: 03/29/2023, 04/14/2023.

    Source: California Attorney General

  15. Breach noticeNextGen Healthcare

    NextGen Healthcare, Inc. filed a data breach notice with the Washington Attorney General. Cause listed: Unauthorized Access. Washington residents affected: 21,981.

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

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