Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory T Serfer, D.O.

Internal Medicine Physician in Auburn, NY · enumerated 2007.

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

National Provider Identifier

1518003433

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory T Serfer

Credential D.O.

Sex Male

Practice address 17 Lansing St, Hospitalists Dept, Auburn, NY, 13021

Phone (315) 255-7438

Fax (315) 255-7099

Enumeration date Jan 29, 2007

Last updated in NPPES Feb 7, 2014

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 246789 (NY) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
03600204	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 1518003433 active?

Yes, as of the latest NPPES snapshot, NPI 1518003433 is active (record last updated 2014-02-07).

How do I verify Gregory Serfer's NPI record?

Cross-check NPI 1518003433 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 2014-02-07.