NPPES file of Aug 9, 2026

Gregory W. Thomas, M.D.

Family Medicine Physician · San Luis Obispo, CA

Gregory W. Thomas, M.D. is a family medicine physician with a practice address in San Luis Obispo, California, and NPI 1326192816, issued on Jan 22, 2007. Check the license (California G46138, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1326192816
Name
Gregory W. Thomas
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
G46138 CA
Self-reported in NPPES; status is on the state search
Practice location
1 Grand Ave, San Luis Obispo, CA 93407
Phone
(805) 756-1211
Enumerated
Jan 22, 2007
Record last updated
Aug 8, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(805) 756-5298
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →

Also registered at 1 Grand Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Tatyana Almadin, MA, ATCAthletic Trainer1376383828
  2. Richard Ascoli, M.D.Family Medicine Physician1184854598
  3. Aaron Baker, M.D.Emergency Medicine Physician1215968060
  4. Jay Bettergarcia, PH.D.Counseling Psychologist1003300153
  5. Paul Brylewski, P.A.Physician Assistant1699704858
  6. Michael Corrigan, MDFamily Medicine Physician1487763173

Verify Gregory W. Thomas in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G46138    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Gregory W. Thomas among 17,133 family medicine physician records in California

Gregory W. Thomas, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 41% of them.

  • NPI issued2007 · 41% of these records are older, 47% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 62% of these records are
  • Record last updated2008 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

41 family medicine physician records list a practice address in San Luis Obispo

They are 41 of the 3,403 NPPES records with a practice address in San Luis Obispo, and 17,133 family medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 17,133 in California → Every provider in San Luis Obispo → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Richard Ascoli, M.D.San Luis Obispo, CA 934071184854598
  2. Terry Chen, D.O.San Luis Obispo, CA 934071003229352
  3. Michael Corrigan, MDSan Luis Obispo, CA 934071487763173
  4. Patricia Robinson, MDSan Luis Obispo, CA 934071265457592
  5. Norman Smith, M.D.San Luis Obispo, CA 934071417194408
  6. Andrea Angelucci, D.O.San Luis Obispo, CA 934051851616106
  7. Lisa Brazil, C.F.N.P.San Luis Obispo, CA 934051154419117
  8. Mary Brown, MDSan Luis Obispo, CA 934051346280492

Common questions

What is Gregory W. Thomas, M.D.'s NPI number?

Gregory W. Thomas, M.D.'s National Provider Identifier (NPI) is 1326192816, issued on Jan 22, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Gregory W. Thomas, M.D. located?

The NPPES record lists a practice address at 1 Grand Ave, San Luis Obispo, CA, 93407. Phone: (805) 756-1211. Providers update this record themselves, so call before visiting.

How can I verify Gregory W. Thomas, M.D.'s license?

NPPES lists California license number G46138, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.