Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John M Marzo, M.D.

Specialist in Buffalo, NY · enumerated 2005.

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

National Provider Identifier

1336121524

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Registry record

Entity type Individual (Type 1)

Name John M Marzo

Credential M.D.

Sex Male

Practice address 3435 Main St, 160 Farber Hall, Buffalo, NY, 14214

Phone (716) 829-2982

Fax (716) 829-3945

Enumeration date Nov 15, 2005

Last updated in NPPES Mar 10, 2011

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 164844 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is John Marzo?

John Marzo is registered in NPPES with the primary taxonomy of Specialist. 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 2011-03-10.