James N. Cohn, MD
Ophthalmology Physician · Fremont, CA
James N. Cohn, MD is an ophthalmology physician with a practice address in Fremont, California, and NPI 1043304173, issued on Oct 3, 2006. Check the license (California G57505, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James N. Cohn
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- G57505 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3775 Beacon Ave, Fremont, CA 94538
- Phone
- (510) 791-2233
- Enumerated
- Oct 3, 2006
- Record last updated
- Dec 19, 2023
- Fax
- (510) 791-0795
- Medicaid ID
- 1891025813 CA
- Medicare enrollment
- Enrolled (PECOS I20090206000548); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 3775 Beacon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Amram, MAStudent in an Organized Health Care Education/Training Program1245424944
- Marie Blanchard, DMHClinical Psychologist1538158019
- Dennis Ming Tak Chung, PH.D., BCBA-DClinical Psychologist1497069215
- Jodi DraperMental Health Counselor1932399417
- Steven Fanucchi, M.F.T.Marriage & Family Therapist1215034012
- Michael Ferro, MFTIMental Health Counselor1649461989
Verify James N. Cohn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G57505Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,109 Medicare Part D claims for 221 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Latanoprost376 claims
- Timolol Maleate171 claims
- Prednisolone Acetate150 claims
- Ofloxacin83 claims
- Ketorolac Tromethamine76 claims
- Travoprost28 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): 3.1 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: $26.08
1 payment: food and beverage; the largest payer was Abbvie 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.
Bills Medicare through 2 group practices
- Neovision Eye Center A MedicalUnion City, CA
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James N. Cohn among 2,899 ophthalmology physician records in California
James N. Cohn, 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 45% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1982 · median 2001 among the 1,907 with a school on file
- Record last updated2023 · 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 Fremont → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Amy Badger-Asaravala, M.D.Fremont, CA 945381831389089
- Audrey Chow, MDFremont, CA 945381386106441
- Taliva Martin, M.D.Fremont, CA 945381386822112
- Judy Ou, MDFremont, CA 945381568483964
- Sara PrasertsitFremont, CA 945381730321423
- James Resneck, MDFremont, CA 945381740352590
- Timothy Scott, MDFremont, CA 945381902997265
- Amelia Sheh, MDFremont, CA 945381376749713
Common questions
What is James N. Cohn, MD's NPI number?
James N. Cohn, MD's National Provider Identifier (NPI) is 1043304173, issued on Oct 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James N. Cohn, MD located?
The NPPES record lists a practice address at 3775 Beacon Ave, Fremont, CA, 94538. Phone: (510) 791-2233. Providers update this record themselves, so call before visiting.
How can I verify James N. Cohn, MD's license?
NPPES lists California license number G57505, 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 N. Cohn, MD prescribe under Medicare Part D?
In 2024, James N. Cohn, MD had 1,109 Medicare Part D claims for 221 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is James N. Cohn, MD's MIPS final score?
The 2023 MIPS final score is 3.1 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.