Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Mark D Chazen, M.D.

Urology Physician in Cheektowaga, NY · enumerated 2006.

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

National Provider Identifier

1518931989

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark D Chazen

Credential M.D.

Sex Male

Practice address 3085 Harlem Road, Suite 200, Cheektowaga, NY, 14225

Phone (716) 844-5000

Fax (716) 844-5050

Enumeration date Feb 14, 2006

Last updated in NPPES Mar 1, 2011

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 191098 (NY) Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 191098-1 (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
005247231	Other	NY	BLUE CROSS
01739899	Medicaid	NY	-
160985156	Other	-	UHC-EMPIRE
1908966	Other	NM	INDEPENDENT HEALTH INS
340013524	Other	NY	RAILROAD MEDICARE
00010297801	Other	NY	UNIVERA INSURANCE
1099639	Other	NY	GHI

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 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.

What specialty is Mark Chazen?

Mark Chazen is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Philip Aliotta Urology Physician · Cheektowaga, NY NPI 1760455356 John Pinski Urology Physician · Cheektowaga, NY NPI 1316911779 Dhiren Shah Radiation Oncology Physician · Cheektowaga, NY NPI 1427011782 Amy Walter Physical Therapist · Cheektowaga, NY NPI 1477707198

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-01.