James Allen Gammon, MD
Ophthalmology Physician · Modesto, CA
James Allen Gammon, MD is an ophthalmology physician with a practice address in Modesto, California, and NPI 1598800062, issued on Feb 21, 2007. Check the license (California C334380, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James Allen Gammon
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- C334380 CA
Self-reported in NPPES; status is on the state search - Practice location
- 500 Coffee Road, Modesto, CA 95355
- Phone
- (209) 522-7362
- Enumerated
- Feb 21, 2007
- Record last updated
- Oct 1, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (209) 522-7314
- Medicare enrollment
- Enrolled (PECOS I20070423000337); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 1969
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 500 Coffee Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jerome Robson, M.D.Anesthesiology Physician1386677417
Verify James Allen Gammon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C334380Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% more Medicare Part D claims than the average ophthalmology physician in 2024
1,981 Medicare Part D claims for 440 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 48% of claims.
Most prescribed
- Latanoprost768 claims
- Prednisolone Acetate277 claims
- Brimonidine Tartrate239 claims
- Ofloxacin238 claims
- Rocklatan211 claims
- Timolol Maleate93 claims
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.
The MIPS final score for 2023 (Medicare payment program): 16.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $13.86
1 payment: food and beverage; the largest payer was Thea Pharma Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
James Allen Gammon among 2,899 ophthalmology physician records in California
James Allen Gammon, MD is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 33% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1969 · median 2001 among the 1,907 with a school on file
- Record last updated2012 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Modesto → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Brian Lenser, MDModesto, CA 953551275504524
- Charles McBride, MDModesto, CA 953551114940301
- Rangram Chandran, MDModesto, CA 953561194714642
- Brent Lum, M.D.Modesto, CA 953561891954772
- Hany Michail, MDModesto, CA 953561275673709
- Kevin Craig, MDModesto, CA 953501912089061
- Keith Davis, MDModesto, CA 953501639268089
- Brian Fechter, MDModesto, CA 953501225181399
Common questions
What is James Allen Gammon, MD's NPI number?
James Allen Gammon, MD's National Provider Identifier (NPI) is 1598800062, issued on Feb 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is James Allen Gammon, MD located?
The NPPES record lists a practice address at 500 Coffee Road, Modesto, CA, 95355. Phone: (209) 522-7362. Providers update this record themselves, so call before visiting.
How can I verify James Allen Gammon, MD's license?
NPPES lists California license number C334380, 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.
How much does James Allen Gammon, MD prescribe under Medicare Part D?
In 2024, James Allen Gammon, MD had 1,981 Medicare Part D claims for 440 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is James Allen Gammon, MD's MIPS final score?
The 2023 MIPS final score is 16.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.