Myron Marx, M.D.
Diagnostic Radiology Physician · San Francisco, CA
Myron Marx, M.D. is a diagnostic radiology physician with a practice address in San Francisco, California, and NPI 1083657928, issued on Jun 14, 2006. Check the license (California G42559, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Myron Marx
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- G42559 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3700 California St, San Francisco, CA 94118
- Phone
- (415) 750-6025
- Enumerated
- Jun 14, 2006
- Record last updated
- Nov 22, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 00G425590 CA
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 3700 California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Myron Marx in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G42559Check 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% fewer Medicare Part D claims than the average diagnostic radiology physician in 2024
35 Medicare Part D claims, against an average of 51 among the 2,711 providers of this specialty who prescribed in Part D.
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.
Myron Marx among 4,500 diagnostic radiology physician records in California
Myron Marx, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% 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, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2010 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in San Francisco → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Thomas Brown, M.D.San Francisco, CA 941181063451615
- Raymond Cummins, M.D.San Francisco, CA 941181821030768
- Susan Denny, M.D.San Francisco, CA 941181902848112
- Maureen Hogan, M.D.San Francisco, CA 941181629356985
- Naveen Kumar, M.D.San Francisco, CA 941181669554317
- Joseph Leach, MD, PHDSan Francisco, CA 941181134548217
- Jay Mall, M.D.San Francisco, CA 941181629016050
- Kirk Moon, M.D.San Francisco, CA 941181295779833
Common questions
What is Myron Marx, M.D.'s NPI number?
Myron Marx, M.D.'s National Provider Identifier (NPI) is 1083657928, issued on Jun 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Myron Marx, M.D. located?
The NPPES record lists a practice address at 3700 California St, San Francisco, CA, 94118. Phone: (415) 750-6025. Providers update this record themselves, so call before visiting.
How can I verify Myron Marx, M.D.'s license?
NPPES lists California license number G42559, 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 Myron Marx, M.D. prescribe under Medicare Part D?
In 2024, Myron Marx, M.D. had 35 Medicare Part D claims; the average among diagnostic radiology physician prescribers was 51. 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.
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.