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44 disclosed this week · 26,355 on record

Sunflower Medical Group

Disclosed Mar 7, 2025220,968 affectedConfirmed

Official notice

The covered entity (CE), Sunflower Medical group, reported that it experienced a cyberattack that compromised the protected health information (PHI) of approximately 220,968 individuals. The PHI involved names, dates of birth, addresses, social security and drivers’ license numbers, claims information, diagnoses/conditions, lab results, medications, and other treatment information. The CE notified HHS, affected individuals, and the media. In its mitigation efforts, the CE deployed endpoint monitoring, implemented security enhancements, and retrained its workforce to better protect its electronic PHI. OCR provided the CE with technical assistance regarding the HIPAA Rules.

What is known

People affected220,968 (as reported to HHS)
DisclosedMar 7, 2025
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
attack2026-09-25
unknown to hackingby backfillSource
data_types2026-09-25
[] to ["names","health"]by backfillSource
records_basis2026-09-25
empty to hhsby backfillSource
records2026-09-25
empty to 220968by backfillSource
summary2026-09-25
empty to The covered entity (CE), Sunflower Medical group, reported that it experienced a cyberattack that compromised the protected health information (PHI) of approximately 220,968 individuals. The PHI involved names, dates of birth, addresses, soby backfillSource
source2026-09-25
empty to https://ago.vermont.gov/document/2025-03-07-sunflower-medical-group-data-breach-notice-consumersby backfillSource
source2026-09-25
empty to https://ago.vermont.gov/document/2025-05-12-sunflower-medical-group-data-breach-notice-consumersby backfillSource
Added2026-09-25
First recordedby backfillSource

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

Everything about Sunflower Medical Group