NPPES file of Aug 9, 2026

Jeffrey Scott Mason, M.D.

Endocrinology, Diabetes & Metabolism Physician · La Verne, CA

Jeffrey Scott Mason, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in La Verne, California, and NPI 1255308912, issued on Mar 1, 2006. Check the license (California G32644, 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
1255308912
Name
Jeffrey Scott Mason
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License number
G32644 CA
Self-reported in NPPES; status is on the state search
Practice location
5670 Shemiran St, La Verne, CA 91750
Phone
(909) 593-4079
Enumerated
Mar 1, 2006
Record last updated
Jul 13, 2026
Fax
(951) 274-3056
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 endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →

Verify Jeffrey Scott Mason in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G32644    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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Jeffrey Scott Mason among 1,131 endocrinology, diabetes & metabolism physician records in California

Jeffrey Scott Mason, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% 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 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 54% newer
  • In a Medicare fileNo · 84% of these records are
  • In the CMS Doctors and Clinicians fileNo · 69% of these records are
  • Record last updated2026 · 57% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Endocrinology, Diabetes & Metabolism Physician providers in California

There are 1,131 endocrinology, diabetes & metabolism physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,131 in California → Every provider in La Verne → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. Sadiq Mandilawi, MDLa Verne, CA 917501295716736
  2. Yi-Ju Chen, M.D.Monterey Park, CA 917541396361093
  3. Justin Do, DOMonterey Park, CA 917541952861049
  4. William Kurban, MDGlendora, CA 917411134385271
  5. Rucha Mehta, MDPomona, CA 917661184725749
  6. Airani Sathananthan, MDPomona, CA 917661063422459
  7. Seerat Anand, M.D.Pomona, CA 917671417575085
  8. Prasad Jeereddi, MDPomona, CA 917671821058470

Common questions

What is Jeffrey Scott Mason, M.D.'s NPI number?

Jeffrey Scott Mason, M.D.'s National Provider Identifier (NPI) is 1255308912, issued on Mar 1, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Jeffrey Scott Mason, M.D. located?

The NPPES record lists a practice address at 5670 Shemiran St, La Verne, CA, 91750. Phone: (909) 593-4079. Providers update this record themselves, so call before visiting.

How can I verify Jeffrey Scott Mason, M.D.'s license?

NPPES lists California license number G32644, 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.