NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William J Harmon, MD

Urology Physician in San Antonio, TX · enumerated 2006 · practices at Urology San Antonio P A.

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

National Provider Identifier

1104806207

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. William J Harmon
Credential MD
Sex Male
Practice address 7909 Fredericksburg Rd Ste 135, San Antonio, TX, 78229
Phone (210) 614-4544
Fax (210) 679-3714
Enumeration date Jan 17, 2006
Last updated in NPPES Apr 17, 2025

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License L1065 (TX) 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

Where does William Harmon practice?
The practice location on file with NPPES is in San Antonio, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Harmon?
The National Provider Identifier (NPI) for William Harmon is 1104806207, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-17.