Stephen Alan Sherwin, M.D.
Medical Oncology Physician · San Francisco, CA
Stephen Alan Sherwin, M.D. is a medical oncology physician with a practice address in San Francisco, California, and NPI 1437461431, issued on Jul 7, 2010. Check the license (California G41963, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephen Alan Sherwin
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- G41963 CA
Self-reported in NPPES; status is on the state search - Practice location
- 995 Potrero Avenue, San Francisco, CA 94110
- Phone
- (415) 476-4082
- Enumerated
- Jul 7, 2010
- Record last updated
- Jul 7, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 995 Potrero Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephen Alan Sherwin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G41963Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average medical oncology physician in 2024
35 Medicare Part D claims for 13 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Industry payments in 2024: $902,212.62
58 payments; by number, the most common kind was travel and lodging; the largest payer was Neurocrine Biosciences, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 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.
Stephen Alan Sherwin among 447 medical oncology physician records in California
Stephen Alan Sherwin, M.D. is one of 447 medical oncology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 65% of them.
- NPI issued2010 · 65% of these records are older, 33% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2010 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in San Francisco → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Judith Luce, MDSan Francisco, CA 941101073628400
- Natalie Sacks, M.D.San Francisco, CA 941101851590897
- Ana Velazquez, MD MSCSan Francisco, CA 941101144647421
- Christopher Benz, M.D.San Francisco, CA 941151457381014
- Emily Bergsland, MDSan Francisco, CA 941151295792729
- John Berry, M.D.San Francisco, CA 941151942236997
- Charles Dollbaum, M.D.San Francisco, CA 941151205863552
- Thierry Jahan, MDSan Francisco, CA 941151427007657
Common questions
What is Stephen Alan Sherwin, M.D.'s NPI number?
Stephen Alan Sherwin, M.D.'s National Provider Identifier (NPI) is 1437461431, issued on Jul 7, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Alan Sherwin, M.D. located?
The NPPES record lists a practice address at 995 Potrero Avenue, San Francisco, CA, 94110. Phone: (415) 476-4082. Providers update this record themselves, so call before visiting.
How can I verify Stephen Alan Sherwin, M.D.'s license?
NPPES lists California license number G41963, 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 Stephen Alan Sherwin, M.D. prescribe under Medicare Part D?
In 2024, Stephen Alan Sherwin, M.D. had 35 Medicare Part D claims for 13 beneficiaries; the average among medical oncology physician prescribers was 703. 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.