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Medical Management Resource Group, L.L.C. Data Breach (February 2024): What Was Exposed and What To Do

Last updated Oct 20, 2026 · Based on 3 official filings · See sources

According to the notice filed with the Washington State Attorney General on Feb 6, 2024, Medical Management Resource Group, L.L.C. reported a data breach. It was also reported to the U.S. Department of Health and Human Services, Office for Civil Rights and the California Attorney General. People affected: 2,264,157 people (official total in the U.S. Department of Health and Human Services, Office for Civil Rights filing, filed Feb 6, 2024).

Key facts

From 3 official filings
Organization
Medical Management Resource Group, L.L.C.
Also filed as: Medical Management Resource Group, L.L.C., d.b.a. American Vision Partners
Source: Washington State Attorney General, filed Feb 6, 2024
People affected
2,264,157
Official total in the U.S. Department of Health and Human Services, Office for Civil Rights filing, filed Feb 6, 2024
Source: U.S. Department of Health and Human Services, Office for Civil Rights, filed Feb 6, 2024
Incident dates
Nov 14, 2023
Source: Washington State Attorney General, filed Feb 6, 2024
Discovered Nov 14, 2023
Source: Washington State Attorney General, filed Feb 6, 2024
Notice dates
First filed Feb 6, 2024; latest filing Feb 29, 2024
Source: Washington State Attorney General, filed Feb 6, 2024
Information exposed
  • Social Security number
  • Medical information
  • Health insurance information
  • Date of birth
  • Name
Sources: Washington AG, Feb 6, 2024; HHS, Feb 6, 2024
Filed with
Free credit monitoring
No offer is stated in the filings we have. Check your letter.

What to do now

Steps chosen from the information listed in the official filings. Your own letter may list more.

  1. A credit freeze stops new credit accounts being opened in your name. It is free by law and you can lift it when you need credit: Equifax, Experian and TransUnion.

  2. An IP PIN stops someone else filing a tax return with your Social Security number. Get one from the IRS at irs.gov.

  3. Check the Explanation of Benefits (EOB) statements from your insurer for visits, prescriptions or claims you do not recognize, and contact your insurer about anything unfamiliar.

  4. Scammers often contact people after a breach, pretending to be the organization, a bank or a government agency. Do not give your Social Security number, passwords or codes to anyone who contacts you first.

  5. You can get free credit reports from all three bureaus at AnnualCreditReport.com, the official site.

  6. The Federal Trade Commission's IdentityTheft.gov gives you a personal recovery plan.

Is the letter real?

The agency published an official copy of the notice. Compare your letter with it:

Letters usually list a phone number for questions. Before calling, check that it matches the number in the official copy linked above.

Never give your Social Security number, bank details or passwords to someone who contacts you first.

Timeline

  1. Incident began (earliest date reported) source
  2. Organization discovered the incident source
  3. Reported to Washington AG and HHS source
  4. Reported to California AG source

Sources

  1. Washington State Attorney General Notice filed Feb 6, 2024
    Filed as “Medical Management Resource Group, L.L.C.” · 4,482 Washington residents · Official copy of the letter
    The link opens the Attorney General's list of notices.
  2. U.S. Department of Health and Human Services, Office for Civil Rights Breach report filed Feb 6, 2024
    Filed as “Medical Management Resource Group, L.L.C.” · total 2,264,157
    The link opens the agency's list; search it for the organization name.
  3. California Attorney General Notice filed Feb 29, 2024
    Filed as “Medical Management Resource Group, L.L.C., d.b.a. American Vision Partners”

Last updated Oct 20, 2026. Our summaries are written in our own words from the official filings above. Spotted an error? Report a correction.