Confirmed breach

Marathon Health data breach

USUnited States · IN

Marathon Health (IN, United States) notified the Vermont Attorney General and the Texas Attorney General of a data breach on 30 October 2026. It told the states about 234,534 Texas residents; the total can be higher.

People affected: 234,534Texas residents · one state’s count, the total can be higher
Reported: 30 October 2026Official notice and 1 more

Across the state notices: at least 243,392 people (Vermont and Texas: each state counts only its own residents)

What was exposed 6

Social Security numbers
Health insurance details
Health and medical information
Dates of birth
Names
Addresses

What changed since it was first reported

30 October 2026 Confirmed breach, 234,534 Texas residents (Texas Attorney General)

Sources 2

Official notices are read by code from the regulator’s own register. More notices to Vermont, Texas. · Corrections and changes

If Marathon Health had your data

Look for Marathon Health’s own notice or letter: it should say what of yours was involved. Keep it.
An ID number cannot be changed, so lock it: a credit freeze or fraud alert in the US, a credit warning (kreditadvarsel) on borger.dk in Denmark, Cifas protective registration in the UK.
Check your health insurer’s statements for treatment you never had.
Expect scams that use your details: calls, texts or emails pretending to be Marathon Health, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.