John Belzer, M.D.
Sports Medicine (Orthopaedic Surgery) Physician · San Francisco, CA
John Belzer, M.D. is a sports medicine (orthopaedic surgery) physician with a practice address in San Francisco, California, and NPI 1417043993, issued on Oct 4, 2006. Check the license (California G68596, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Belzer
- Credential
- M.D.
- Primary taxonomy
- Sports Medicine (Orthopaedic Surgery) Physician 207XX0005X
- License number
- G68596 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3838 California St, San Francisco, CA 94118
- Phone
- (415) 592-2014
- Enumerated
- Oct 4, 2006
- Record last updated
- Feb 16, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (415) 752-2560
- Medicare enrollment
- Enrolled (PECOS I20041006000998); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest sports medicine (orthopaedic surgery) physician records → All 384 in California → Look up another NPI →
Also registered at 3838 California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Catherine Berger-Dujmovic, MDObstetrics & Gynecology Physician1467470070
- Frederic Bost, M.D.Orthopaedic Surgery Physician1376639823
Verify John Belzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G68596Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average sports medicine (orthopaedic surgery) physician in 2024
108 Medicare Part D claims for 62 beneficiaries, against an average of 288 among the 2,562 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 21 claims were for opioids.
Most prescribed
- Diclofenac Sodium52 claims
- Celecoxib13 claims
- Oxycodone Hcl11 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 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).
Industry payments in 2024: $518.09
7 payments; by number, the most common kind was food and beverage; the largest payer was Smith+Nephew, Inc. The 2,400 providers of this specialty with any payment received $19,779.31 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
- California Pacific Orthopaedics And Sports Medicine A Medical CorporatSan Francisco, CA
- Regents OF The University OF California - UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Belzer among 384 sports medicine (orthopaedic surgery) physician records in California
John Belzer, M.D. is one of 384 sports medicine (orthopaedic surgery) physician records with a practice address in California. 88% 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, 57% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1988 · median 2003 among the 293 with a school on file
- Record last updated2021 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XX0005X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sports Medicine (Orthopaedic Surgery) Physician providers in California
There are 384 sports medicine (orthopaedic surgery) physician records in California.
All 384 in California → Every provider in San Francisco → Sports Medicine (Orthopaedic Surgery) Physician nationwide →
The 8 sports medicine (orthopaedic surgery) physician records with the nearest ZIP codes
- Husam AlmajedSan Francisco, CA 941181639749369
- Keith Chan, M.D.San Francisco, CA 941181548452782
- Jon Dickinson, M.D.San Francisco, CA 941181972699213
- Jeffrey Halbrecht, MD, PCSan Francisco, CA 941151235211145
- Paul Roache, M.D.San Francisco, CA 941141255362919
- James Chen, M.D., M.P.H.San Francisco, CA 941081306040548
- Ajith MaligeSan Francisco, CA 941081538694138
- Neil Pathare, M.D.San Francisco, CA 941081659532893
Common questions
What is John Belzer, M.D.'s NPI number?
John Belzer, M.D.'s National Provider Identifier (NPI) is 1417043993, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Belzer, M.D. located?
The NPPES record lists a practice address at 3838 California St, San Francisco, CA, 94118. Phone: (415) 592-2014. Providers update this record themselves, so call before visiting.
How can I verify John Belzer, M.D.'s license?
NPPES lists California license number G68596, 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 John Belzer, M.D. prescribe under Medicare Part D?
In 2024, John Belzer, M.D. had 108 Medicare Part D claims for 62 beneficiaries; the average among sports medicine (orthopaedic surgery) physician prescribers was 288. Part D covers Medicare prescriptions only.
What is John Belzer, M.D.'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.