Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Leslie B Tyson, NP

Q: What is the NPI number for Leslie Tyson?

The National Provider Identifier (NPI) for Leslie Tyson is 1740448588, a Type 1 (individual) record in the CMS NPPES registry.

Adult Health Nurse Practitioner in New York, NY · enumerated 2008 · practices at Mskcc.

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

National Provider Identifier

1740448588

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Registry record

Entity type Individual (Type 1)

Name Leslie B Tyson

Credential NP

Sex Female

Practice address 160 E 53rd St, 9th Floor, New York, NY, 10022

Phone (212) 639-7590

Enumeration date May 29, 2008

Last updated in NPPES May 29, 2008

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 301851 (NY) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

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 is the NPI number for Leslie Tyson?

The National Provider Identifier (NPI) for Leslie Tyson is 1740448588, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leslie Tyson practice?

The practice location on file with NPPES is in New York, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-29.