Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William D Pum, MD

Family Medicine Physician in Rochester, NY · enumerated 2006 · practices at The Unity Hospital of Rochester.

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

National Provider Identifier

1669409421

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Registry record

Entity type Individual (Type 1)

Name William D Pum

Credential MD

Sex Male

Practice address 3379 Chili Ave, Suite 100, Rochester, NY, 14624

Phone (585) 889-0750

Fax (585) 889-0759

Enumeration date Jun 27, 2006

Last updated in NPPES Jan 9, 2023

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 138588 (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
P00742882-DD1972 GRP	Other	NY	RAILROAD MEDICARE
01443181	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1669409421 active?

Yes, as of the latest NPPES snapshot, NPI 1669409421 is active (record last updated 2023-01-09).

How do I verify William Pum's NPI record?

Cross-check NPI 1669409421 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-09.