NPPES file of Aug 9, 2026

James Leonard Comazzi, M.D.

Specialist · Sonora, CA

James Leonard Comazzi, M.D. is a specialist with a practice address in Sonora, California, and NPI 1144268392, issued on Jun 2, 2006. Check the license (California G39987, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1144268392
Name
James Leonard Comazzi
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
G39987 CA
Self-reported in NPPES; status is on the state search
Practice location
900 Greenley RD, Sonora, CA 95370
Phone
(209) 532-0511
Enumerated
Jun 2, 2006
Record last updated
Jul 13, 2026
Fax
(209) 532-6092
Medicaid ID
00G399870 CA
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.
Download card Updates feed

8 nearest specialist records → All 5,749 in California → Look up another NPI →

Also registered at 900 Greenley RD

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

  1. Suneeta Chhugani, MDRheumatology Physician1750469664
  2. Jacquelyn Cituk, PHARMD, RPHPharmacist1881028843
  3. Brenda Forrest, M.DInternal Medicine Physician1538375365
  4. Edman Fuentes, PACSurgical Physician Assistant1013988955
  5. Shalom Margolis, M.D.Specialist1215976576
  6. Meredith McBride, MDVascular Surgery Physician1255439923

Verify James Leonard Comazzi in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license G39987    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
Find 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.

Is this page about you? You can ask us to correct, restrict or remove it: how.

99% fewer Medicare Part D claims than the average specialist in 2024

18 Medicare Part D claims, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.

  1. James Comazzi18
  2. Specialty average1,380

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

James Leonard Comazzi among 5,749 specialist records in California

James Leonard Comazzi, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 60% newer
  • In a Medicare fileYes · 30% of these records are
  • In the CMS Doctors and Clinicians fileNo · 19% of these records are
  • Record last updated2026 · 77% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in California

There are 5,749 specialist records in California.

All 5,749 in California → Every provider in Sonora → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Max Bynum, M.D.Sonora, CA 953701205855582
  2. Choo Lee, M.D.Sonora, CA 953701649271818
  3. Shalom Margolis, M.D.Sonora, CA 953701215976576
  4. Steven Peterson, MDSonora, CA 953701083774897
  5. Alice ScottSonora, CA 953701861687691
  6. Donovan Teel, M.D.Sonora, CA 953701760449755
  7. Melissa Lopez, MEDICAL MTRipon, CA 953661083943948
  8. Agnes BalzaTracy, CA 953761346416286

Common questions

What is James Leonard Comazzi, M.D.'s NPI number?

James Leonard Comazzi, M.D.'s National Provider Identifier (NPI) is 1144268392, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.

Where is James Leonard Comazzi, M.D. located?

The NPPES record lists a practice address at 900 Greenley RD, Sonora, CA, 95370. Phone: (209) 532-0511. Providers update this record themselves, so call before visiting.

How can I verify James Leonard Comazzi, M.D.'s license?

NPPES lists California license number G39987, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does James Leonard Comazzi, M.D. prescribe under Medicare Part D?

In 2024, James Leonard Comazzi, M.D. had 18 Medicare Part D claims; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.