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Mount Kisco Surgery Center

Disclosed Jun 25, 20242 years ago22,139 affectedConfirmed

Official notice

The covered entity (CE), The Mount Kisco Surgery Center dba The Ambulatory Surgery Center of Westchester, reported that it experienced a hacking incident that affected the protected health information (PHI) of 22,139 individuals. The PHI involved included names, Social Security and drivers’ license or state identification numbers, dates of birth, diagnoses, medications, claims and financial information, and health insurance and treatment information. The CE notified HHS, affected individuals, and the media. In response to the breach, the CE provided complimentary credit monitoring services and implemented additional administrative, technical, and security safeguards. The responsible employee was sanctioned.

What is known

People affected22,139 (as reported to HHS)
DisclosedJun 25, 2024
HappenedOct 23, 2023
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

WhereFiledPeople
HHS archivetotalJun 25, 202422,139
Indiana AGresidents of INJun 26, 20243
History of this record
  • 2026-09-25 · attack: unknown to hacking · backfill source
  • 2026-09-25 · data_types: [] to ["names","health"] · backfill source
  • 2026-09-25 · records_basis: organization to hhs · backfill source
  • 2026-09-25 · records: 21073 to 22139 · backfill source
  • 2026-09-25 · disclosed: 2024-06-26 to 2024-06-25 · backfill source
  • 2026-09-25 · summary: empty to The covered entity (CE), The Mount Kisco Surgery Center dba The Ambulatory Surgery Center of Westchester, reported that it experienced a hacking incident that affected the protected health information (PHI) of 22,139 individuals. The PHI in · backfill source
  • 2026-09-25 · added · backfill source

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

Everything about Mount Kisco Surgery Center

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