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

Dr. Martin S Finkelstein, M.D.

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

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

National Provider Identifier

1033127998

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Registry record

Entity type Individual (Type 1)

Name Dr. Martin S Finkelstein

Credential M.D.

Sex Male

Practice address New York, NY, 10016

Phone (646) 370-2030

Fax (646) 370-2012

Enumeration date Aug 4, 2006

Last updated in NPPES Jun 24, 2014

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 094747-1 (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
00495249	Medicaid	NY	-
094747	Other	-	HIP
139146	Other	-	UNITED HEALTHCARE
133484273	Other	-	PHCS
0M0969	Other	-	HEALTHNET
139146	Other	-	EMPIRE UNITED
133484273001	Other	-	CIGNA
P00165570	Other	NY	RAILROAD MEDICARE
094747	Other	-	HIP VIP

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

What specialty is Martin Finkelstein?

Martin Finkelstein is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-06-24.