Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Walter Alain Thomas, M.D.

Preferred Provider Organization in San Diego, CA · enumerated 2007 · authorized official Isabel Garcia, Billing Supervisor.

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

National Provider Identifier

1669655536

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Registry record

Entity type Organization (Type 2)

Legal business name Walter Alain Thomas, M.D.

Other name <Unavail>

Practice address 3444 Kearny Villa Rd, Suite#3, San Diego, CA, 92123

Phone (858) 616-6400

Fax (858) 616-6936

Enumeration date Dec 13, 2007

Last updated in NPPES Dec 13, 2007

Taxonomy & classification

305R00000X Preferred Provider Organization Managed Care Organizations · License A67913 (CA) Primary

Authorized official

Name Isabel Garcia

Title Billing Supervisor

Phone (858) 616-6400

Other identifiers

Identifier	Type	State	Issuer
A67913	Other	CA	STATE LICENSE
00A679130	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Walter Alain Thomas, M.D. located?

The practice location on file with NPPES is in San Diego, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-12-13. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-13.