Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Memorial Sloan Kettering Cancer Center

Special Hospital in New York, NY · enumerated 2008 · authorized official Julianne Kliesch, Nurse Practitioner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1831360163

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Registry record

Entity type Organization (Type 2)

Legal business name Memorial Sloan Kettering Cancer Center

Practice address 1275 York Ave, 5the Flr Rm 513, New York, NY, 10065

Phone (212) 639-3259

Fax (212) 717-3332

Enumeration date Mar 14, 2008

Last updated in NPPES Mar 14, 2008

Taxonomy & classification

284300000X Special Hospital Hospitals · License 334355 (NY) Primary

Authorized official

Name Julianne Kliesch

Title Nurse Practitioner

Phone (212) 639-3259

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Memorial Sloan Kettering Cancer Center?

Memorial Sloan Kettering Cancer Center is registered in NPPES as a Special Hospital (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-14.