James Joseph Hershon, MD
Critical Care Medicine (Internal Medicine) Physician · San Francisco, CA
James Joseph Hershon, MD is a critical care medicine (internal medicine) physician with a practice address in San Francisco, California, and NPI 1508940305, issued on Oct 25, 2006. Check the license (California G34963, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James Joseph Hershon
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- G34963 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2351 Clay St, San Francisco, CA 94115
- Phone
- (415) 923-3421
- Enumerated
- Oct 25, 2006
- Record last updated
- Jan 7, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (415) 600-1414
- Medicaid ID
- 00G349630 CA
- Medicare enrollment
- Enrolled (PECOS I20080822000663); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 723 in California → Look up another NPI →
Also registered at 2351 Clay St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Au, M.D.Student in an Organized Health Care Education/Training Program1902148091
- Geoffrey Bailey-Gates, M.D.Student in an Organized Health Care Education/Training Program1306137708
- Christopher Brown, MDPulmonary Disease Physician1104900901
- Tze-Ming Chen, M.D.Pulmonary Disease Physician1215092705
- Ivan Cheng, MDCritical Care Medicine (Internal Medicine) Physician1639253438
- Lisa Chui, M.D.Student in an Organized Health Care Education/Training Program1689992927
Verify James Joseph Hershon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G34963Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
13 Medicare Part D claims, against an average of 696 among the 2,873 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 3 group practices
- California Advanced Imaging Medical Associates IncSan Francisco, CA
- San Francisco Critical Care Med Group IncSan Francisco, CA
- Sutter Bay Medical FoundationSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Joseph Hershon among 723 critical care medicine (internal medicine) physician records in California
James Joseph Hershon, MD is one of 723 critical care medicine (internal medicine) physician records with a practice address in California. 87% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 60% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2000 · median 2005 among the 559 with a school on file
- Record last updated2013 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in California
There are 723 critical care medicine (internal medicine) physician records in California.
All 723 in California → Every provider in San Francisco → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Mehrdad Arjomandi, MDSan Francisco, CA 941151912951153
- Ryan Chang, MDSan Francisco, CA 941151831277417
- Ivan Cheng, MDSan Francisco, CA 941151639253438
- Michael Coppolino, MDSan Francisco, CA 941151700964350
- Scott Ferguson, MDSan Francisco, CA 941151770661373
- Sheryl Goldyn, MD, MPHSan Francisco, CA 941151770783250
- Noreen Henig, MDSan Francisco, CA 941151881778686
- George Horng, MDSan Francisco, CA 941151306924972
Common questions
What is James Joseph Hershon, MD's NPI number?
James Joseph Hershon, MD's National Provider Identifier (NPI) is 1508940305, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Joseph Hershon, MD located?
The NPPES record lists a practice address at 2351 Clay St, San Francisco, CA, 94115. Phone: (415) 923-3421. Providers update this record themselves, so call before visiting.
How can I verify James Joseph Hershon, MD's license?
NPPES lists California license number G34963, 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 Joseph Hershon, MD prescribe under Medicare Part D?
In 2024, James Joseph Hershon, MD had 13 Medicare Part D claims; the average among critical care medicine (internal medicine) physician prescribers was 696. Part D covers Medicare prescriptions only.
What is James Joseph Hershon, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. 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.