Every public data breach

Disclosed this week47On record26,367

47 disclosed this week · 26,367 on record

Millstone Medical Outsourcing

Disclosed Sep 18, 20263,503 affectedConfirmed

Official notice

What is known

People affected3,503 (as reported by the organization)
DisclosedSep 18, 2026
HappenedDec 15, 2025
AttackNot stated
Data exposedNamesSocial Security numbersGovernment IDsHealthPayment cardsFinancial
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeago.vermont.gov
Vermont Attorney General breach report: Millstone Medical Outsourcing
Official noticein.gov
Indiana Attorney General 2026 data breach report: Millstone Medical Outsourcing

Notices filed

Residents of INSep 18
Indiana AG1 person
Residents of VTSep 21
Vermont AG2 people
History of this record
records_basis2026-10-02
empty to organizationby dailySource
records2026-10-02
empty to 3503by dailySource
disclosed2026-10-02
2026-09-21 to 2026-09-18by dailySource
occurred2026-10-02
empty to 2025-12-15by dailySource
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (Vermont AG), confirmed by Vermont AG. Record counts are as reported. Not legal advice.

Everything about Millstone Medical Outsourcing