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Dr. William Porter Welbourne, M.D.

Internal Medicine Physician in Geneva, NY · enumerated 2005.

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

National Provider Identifier

1053309633

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Registry record

Entity type Individual (Type 1)
Name Dr. William Porter Welbourne
Credential M.D.
Sex Male
Practice address 200 North St, Suite 102, Geneva, NY, 14456
Phone (315) 787-5400
Fax (315) 787-5475
Enumeration date Oct 8, 2005
Last updated in NPPES Sep 26, 2014

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 119889 (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
00447049 Medicaid NY -
P010119889 Other NY EXCELLUS

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

Where does William Welbourne practice?
The practice location on file with NPPES is in Geneva, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Welbourne?
The National Provider Identifier (NPI) for William Welbourne is 1053309633, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-26.