Every public data breach

Disclosed this week47On record26,367

47 disclosed this week · 26,367 on record

Nephrology Associates Medical Group

Disclosed Feb 27, 20264,631 affectedConfirmed

Official notice

What is known

People affected4,631 (as reported to HHS)
DisclosedFeb 27, 2026
HappenedMay 19, 2025
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeoag.ca.gov
California Attorney General breach notice: Nephrology Associates Medical Group
Official noticeocrportal.hhs.gov
HHS OCR breach report: Nephrology Associates Medical Group (Healthcare Provider, CA)

Notices filed

TotalFeb 27
HHS OCR4,631 people
Residents of CAMar 26
California AGCount not stated
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 4631by backfillSource
disclosed2026-09-25
2026-03-26 to 2026-02-27by 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 Nephrology Associates Medical Group