Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory B Nazar, M.D.

Neurological Surgery Physician in Louisville, KY · enumerated 2005.

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

National Provider Identifier

1851395586

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory B Nazar

Credential M.D.

Sex Male

Practice address 3 Audubon Plaza Dr, Suite 410, Louisville, KY, 40217

Phone (502) 636-2667

Fax (502) 636-2668

Enumeration date Jun 10, 2005

Last updated in NPPES Sep 12, 2016

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 26253 (KY) Secondary

174400000X Specialist Other Service Providers · License 01038382 (IN) Secondary

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License 26253 (KY) 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
50035437	Other	KY	PASSPORT
P00869554	Other	KY	MEDICARE RAILROAD- NIKKY
2557345	Other	KY	CIGNA - NNIKY
50029550	Other	KY	PASSPORT ADVANTAGE - NNIKY
000052153W	Other	KY	HUMANA - NNIKY
000000665482	Other	KY	ANTHEM - NNIKY
K074600	Other	KY	MEDICARE KY - NNIKY
000000746161	Other	KY	ANTHEM
100461820	Medicaid	IN	-
116194	Other	KY	SIHO - NNIKY
64262538	Medicaid	KY	-

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 Gregory Nazar's NPI record?

Cross-check NPI 1851395586 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1851395586 active?

Yes, as of the latest NPPES snapshot, NPI 1851395586 is active (record last updated 2016-09-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-12.