Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Nissen, M.D.

Ophthalmology Physician in New York, NY · enumerated 2005.

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

National Provider Identifier

1609875442

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Nissen

Credential M.D.

Sex Male

Practice address 1317 3rd Ave, First Floor, New York, NY, 10021

Phone (212) 772-7000

Fax (212) 772-7001

Enumeration date Jul 14, 2005

Last updated in NPPES Jul 30, 2012

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 188503 (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
161012	Other	NY	ELDERPLAN
434294P	Other	NY	HIP
134174737	Other	NY	EMPIRE BLUE CR/BLUE SH
46350C	Other	NY	MAGNACARE
0401390	Other	NY	GHI
134174737	Other	NY	MULTIPALN
P865763	Other	NY	OXFORD
134174737	Other	NY	GUARDIAN PHCS
134174737	Other	NY	1199 BENEFIT FUND
2448242	Other	NY	AETNA USHEALTHCARE
01755637	Medicaid	NY	-
134174737	Other	NY	UNITED HEALTHCARE
188503B34	Other	NY	HEALTH FIRST
4987173005	Other	NY	CIGNA

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

How do I verify Michael Nissen's NPI record?

Cross-check NPI 1609875442 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609875442 active?

Yes, as of the latest NPPES snapshot, NPI 1609875442 is active (record last updated 2012-07-30).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-30.