Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark R Kahn, M.D.

Dermatology Physician in Valley Stream, NY · enumerated 2005.

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

National Provider Identifier

1023017464

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark R Kahn

Credential M.D.

Sex Male

Practice address 260 W Sunrise Hwy, Suite 305, Valley Stream, NY, 11581

Phone (516) 791-8664

Fax (516) 791-8420

Enumeration date Jul 19, 2005

Last updated in NPPES Aug 27, 2013

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 174507-1 (NY) Secondary

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License 174507-1 (NY) Secondary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 174507 (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
01836048	Medicaid	NY	-

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 Mark Kahn?

Mark Kahn is registered in NPPES with the primary taxonomy of Dermatology 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 2013-08-27.