NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Stuart Liederson, M.D.

Internal Medicine Physician in New Windsor, NY · enumerated 2006.

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

National Provider Identifier

1083680649

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Registry record

Entity type Individual (Type 1)
Name Dr. Stuart Liederson
Credential M.D.
Sex Male
Practice address New Windsor, NY, 12553
Phone (845) 562-2272
Fax (845) 562-1973
Enumeration date Feb 24, 2006
Last updated in NPPES Dec 30, 2013

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 209961 (NY) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
1083680649 Other NY QUEENS
1730276395 Other NY EMPIRE

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.

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Frequently asked questions

Is NPI 1083680649 active?
Yes, as of the latest NPPES snapshot, NPI 1083680649 is active (record last updated 2013-12-30).
How do I verify Stuart Liederson's NPI record?
Cross-check NPI 1083680649 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-12-30.