BreachCensus

UnitedHealthcare

United States of America

UnitedHealthcare is an organisation in Massachusetts. It appears on the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register and the Delaware Attorney General data security breach database with 14 confirmed incidents; the most recent notice was filed on August 6, 2024.

Data as of October 17, 2026.

Sources

Confirmed incident

US-MA

Disclosed
August 6, 2024
Records affected
4,649

Was I affected? →

Timeline

  1. August 6, 2024
    Reported to regulator Regulator

    MA AG breach notification: 10 Massachusetts residents affected

    source
  2. July 8, 2025
    Press coverage Press

    press report (press_reported): The forensic investigation confirmed that parts of its network were accessed by unauthorized individuals between July 8, 2025, and July 9, 2025

    source
  3. July 9, 2025
    Press coverage Press

    press report (press_reported): Suspicious activity was identified within certain parts of its network on July 9, 2025.

    source
  4. September 21, 2026
    Press coverage Press

    press report (press_reported): Data Breach at Translation Vendor Affects UnitedHealthcare Plan Members Posted By Steve Alder on Sep 21, 2026

    source
What a Massachusetts notice means

Governed by M.G.L. c. 93H. Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.

Note: the count is Massachusetts residents only, not a total.

Massachusetts breach-notification register ↗

Confirmed incident

US-MA

Disclosed
December 14, 2023

Timeline

  1. December 14, 2023
    Reported to regulator Regulator

    MA AG breach notification: 61 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-DE

Occurred
May 30, 2023
Disclosed
September 22, 2023

Timeline

  1. September 22, 2023
    Reported to regulator Regulator

    DE AG breach notification: 470 Delaware residents affected

    source
  2. September 22, 2023
    Reported to regulator Regulator

    DE AG breach notification: 470 Delaware residents affected

    source
  3. September 22, 2023
    Reported to regulator Regulator

    DE AG breach notification: 470 Delaware residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
What a Delaware notice means

Governed by 6 Del. C. §12B-102. Notice to the Attorney General is required when a breach affects more than 500 Delaware residents.

Note: the count is Delaware residents only, not a total.

Delaware breach-notification register ↗

Confirmed incident

US-CA

Occurred
December 1, 2022
Disclosed
August 31, 2023

Timeline

  1. August 31, 2023
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
What a California notice means

Governed by Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗

Confirmed incident

US-MA

Disclosed
August 25, 2023

Timeline

  1. August 25, 2023
    Reported to regulator Regulator

    MA AG breach notification: 19,910 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-MA

Disclosed
October 10, 2022

Timeline

  1. October 10, 2022
    Reported to regulator Regulator

    MA AG breach notification: 402 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-MA

Disclosed
January 19, 2022

Timeline

  1. January 19, 2022
    Reported to regulator Regulator

    MA AG breach notification: 28 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-MA

Disclosed
December 22, 2021

Timeline

  1. December 22, 2021
    Reported to regulator Regulator

    MA AG breach notification: 5 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-MA

Disclosed
September 24, 2021

Timeline

  1. September 24, 2021
    Reported to regulator Regulator

    MA AG breach notification: 12 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.
Confirmed incident

US-MA

Disclosed
July 23, 2021

Timeline

  1. July 23, 2021
    Reported to regulator Regulator

    MA AG breach notification: 2 Massachusetts residents affected

    source
Confirmed incident

US-MA

Disclosed
July 14, 2021

Timeline

  1. July 14, 2021
    Reported to regulator Regulator

    MA AG breach notification: 13 Massachusetts residents affected

    source
Confirmed incident

US-MA

Disclosed
July 2, 2021

Timeline

  1. July 2, 2021
    Reported to regulator Regulator

    MA AG breach notification: 344 Massachusetts residents affected

    source
Confirmed incident

US-MA

Disclosed
May 19, 2021

Timeline

  1. May 19, 2021
    Reported to regulator Regulator

    MA AG breach notification: 24 Massachusetts residents affected

    source
Confirmed incident

US-MA

Disclosed
January 9, 2019

Timeline

  1. January 9, 2019
    Reported to regulator Regulator

    MA AG breach notification: 36 Massachusetts residents affected

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.

Related

Disclosed around the same time