NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Walter G Day, M.D.

Family Medicine Physician in San Angelo, TX · enumerated 2006.

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

National Provider Identifier

1942239207

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Registry record

Entity type Individual (Type 1)
Name Walter G Day
Credential M.D.
Sex Male
Practice address San Angelo, TX, 76904
Phone (325) 223-6347
Fax (325) 223-6377
Enumeration date Jun 30, 2006
Last updated in NPPES Jul 29, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License G3277 (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
141981401 Medicaid TX -
0057EW Other TX BLUE CROSS BLUE SHIELD

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 Walter Day practice?
The practice location on file with NPPES is in San Angelo, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Walter Day?
The National Provider Identifier (NPI) for Walter Day is 1942239207, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-29.