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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Christopher Mathews, M.D.

Infectious Disease Physician in San Diego, CA · enumerated 2006.

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

National Provider Identifier

1194773259

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Registry record

Entity type Individual (Type 1)
Name Dr. William Christopher Mathews
Credential M.D.
Sex Male
Practice address 4168 Front St, San Diego, CA, 92103
Phone (619) 543-3995
Fax (619) 543-7841
Enumeration date May 4, 2006
Last updated in NPPES Feb 11, 2026

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License G32447 (CA) Primary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License APCC19232 (CA) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G 032447 (CA) Secondary
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
00G324470 Medicaid CA -

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

Is NPI 1194773259 active?
Yes, as of the latest NPPES snapshot, NPI 1194773259 is active (record last updated 2026-02-11).
How do I verify William Mathews's NPI record?
Cross-check NPI 1194773259 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 2026-02-11.