BreachScout BreachScout Breach Records

Regulator-posted notice

Breach notice filed by Memorial Sloan Kettering Cancer Center (March 2021)

Organization named: Memorial Sloan Kettering Cancer Center Provisional: identity as filed, not yet matched to the directory
Type as the source lists it: Unauthorized Access/Disclosure

What the sources say

HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) Primary notice

Posted on the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) with a submission date of March 31, 2021.

Organization as reported
Memorial Sloan Kettering Cancer Center, NY
Entity type as reported
Healthcare Provider
Category as reported
Unauthorized Access/Disclosure
Location of information as reported
Network Server
Submission date
March 31, 2021
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 12254, row:3393)
Archived copy
Held in the private archive (provenance)

The covered entity (CE), Memorial Sloan Kettering Cancer Center, reported that employees of its business associate misconfigured a server and exposed the protected health information (PHI) of 18,913 individuals. The PHI involved included names, Social Security numbers, dates of birth, addresses, financial information, diagnoses, lab results, medications prescribed, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided free credit monitoring and fraud protection services, sanctioned workforce members responsible for the breach, and took the affected network server offline.

The source's own words, from the revision above.

Figures, per source

  • 18,913 individuals affected (total reported), as reported by the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals), source date March 31, 2021, revision observed 2026-10-18.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

  • Submission date at the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals)
  • Observed by BreachRecords (revision 12254)
  • Approved by a reviewer

Organizations linked by a reviewer

Archived evidence

  • 3dbc27dd5742e041cc1e7fe18cc669e2901fbd3b86b7007ed27948ff4d406e1f
    text/csv, 5,530,996 bytes, from the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals), retrieved 2026-10-18 16:15 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

Request a correction

A record that disagrees with its source, names the wrong organization or duplicates another is corrected after review. This form is about Breach notice filed by Memorial Sloan Kettering Cancer Center (March 2021). We acknowledge every request within two business days. We reply by email.

The form is being set up. Check back soon.