Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William J. Flynn, M.D.

Surgery Physician in Buffalo, NY · enumerated 2006.

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

National Provider Identifier

1578586293

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Registry record

Entity type Individual (Type 1)

Name Dr. William J. Flynn

Credential M.D.

Sex Male

Practice address 462 Grider St, Dept of Surgery, Buffalo, NY, 14215

Phone (716) 898-5186

Fax (716) 898-3194

Enumeration date Jul 25, 2006

Last updated in NPPES Mar 26, 2014

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 161806 (NY) Primary

2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License 161806 (NY) Secondary

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
01260851	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

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 William Flynn?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-03-26.