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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alex Clark Willingham, M.D.

Physical Medicine & Rehabilitation Physician in San Antonio, TX · enumerated 2005.

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

National Provider Identifier

1558342634

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Registry record

Entity type Individual (Type 1)
Name Dr. Alex Clark Willingham
Credential M.D.
Sex Male
Practice address 16023 Via Shavano, San Antonio, TX, 78249
Phone (210) 615-2225
Fax (210) 615-8432
Enumeration date Nov 7, 2005
Last updated in NPPES Jun 24, 2025

Taxonomy & licenses

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License H1249 (TX) 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
1348369-02 Medicaid TX -
H1249 Other TX TEXAS MEDICAL LICENSE

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

How do I verify Alex Willingham's NPI record?
Cross-check NPI 1558342634 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1558342634 active?
Yes, as of the latest NPPES snapshot, NPI 1558342634 is active (record last updated 2025-06-24).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-24.