Stewart Fong, MD
Internal Medicine Physician · Oakland, CA
Stewart Fong, MD is an internal medicine physician with a practice address in Oakland, California, and NPI 1659459436, issued on Nov 1, 2006. Check the license (California G51405, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stewart Fong
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G51405 CA
Self-reported in NPPES; status is on the state search - Practice location
- 835 Webster Street, Oakland, CA 94607
- Phone
- (510) 318-5800
- Enumerated
- Nov 1, 2006
- Record last updated
- Jan 12, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (510) 986-8681
- Medicaid ID
- 00G514050 CA
- Medicare enrollment
- Enrolled (PECOS I20110317000315); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 835 Webster Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Changlin Wang, M.D.Internal Medicine Physician1861571572
Verify Stewart Fong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G51405Check 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 internal medicine physician in 2024
172 Medicare Part D claims for 80 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate25 claims
- Atorvastatin Calcium15 claims
- Losartan Potassium14 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.
Bills Medicare through one group practice
- Asian Health ServicesOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stewart Fong among 17,696 internal medicine physician records in California
Stewart Fong, MD is one of 17,696 internal medicine 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1982 · median 2004 among the 11,065 with a school on file
- Record last updated2017 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
432 internal medicine physician records list a practice address in Oakland
They are 432 of the 18,558 NPPES records with a practice address in Oakland, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oakland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Xiaoguang Huang, M.D., PHD.Oakland, CA 946071235179870
- Susan Mei Huang, MDOakland, CA 946071093894032
- Dennis Ing, MDOakland, CA 946071477631257
- Anthony Iton, M.D.Oakland, CA 946071609961101
- Nicola Longmuir, MDOakland, CA 946071710065511
- Yee-Bun Lui, M.D.Oakland, CA 946071609845767
Common questions
What is Stewart Fong, MD's NPI number?
Stewart Fong, MD's National Provider Identifier (NPI) is 1659459436, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stewart Fong, MD located?
The NPPES record lists a practice address at 835 Webster Street, Oakland, CA, 94607. Phone: (510) 318-5800. Providers update this record themselves, so call before visiting.
How can I verify Stewart Fong, MD's license?
NPPES lists California license number G51405, 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 Stewart Fong, MD prescribe under Medicare Part D?
In 2024, Stewart Fong, MD had 172 Medicare Part D claims for 80 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.