Marc G. Jaffe, MD
Endocrinology, Diabetes & Metabolism Physician · South San Francisco, CA
Marc G. Jaffe, MD is an endocrinology, diabetes & metabolism physician with a practice address in South San Francisco, California, and NPI 1770661308, issued on Nov 1, 2006. Check the license (California A46300, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marc G. Jaffe
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A46300 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 EL Camino Real, South San Francisco, CA 94080
- Phone
- (650) 742-2000
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A463000 CA
- Medicare enrollment
- Enrolled (PECOS I20101202000579); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1200 EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Karl Anderson, MDUrology Physician1700964301
Verify Marc G. Jaffe in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A46300Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
821 Medicare Part D claims for 252 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Levothyroxine Sodium142 claims
- Methimazole79 claims
- Alendronate Sodium61 claims
- Forteo39 claims
- Testosterone39 claims
- Ozempic33 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
- Permanente Medical Group IncSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc G. Jaffe among 1,131 endocrinology, diabetes & metabolism physician records in California
Marc G. Jaffe, MD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% 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, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1988 · median 2003 among the 779 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in South San Francisco → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Samudyatha Shivalingappa, M.D.Sunnyvale, CA 940861841286960
- Leila Chaychi, MDSan Carlos, CA 940701558535203
- Grace Kim, M.D.San Carlos, CA 940701083634323
- Kevin RoSan Carlos, CA 940701477972628
- Sonia RodriguesSan Carlos, CA 940701881221042
- Andrea Tom, M.D.San Carlos, CA 940701013980390
- Timothy Wong, MDRedwood City, CA 940631891874541
- Dianne Budd, MDSan Francisco, CA 941021457315723
Common questions
What is Marc G. Jaffe, MD's NPI number?
Marc G. Jaffe, MD's National Provider Identifier (NPI) is 1770661308, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc G. Jaffe, MD located?
The NPPES record lists a practice address at 1200 EL Camino Real, South San Francisco, CA, 94080. Phone: (650) 742-2000. Providers update this record themselves, so call before visiting.
How can I verify Marc G. Jaffe, MD's license?
NPPES lists California license number A46300, 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 Marc G. Jaffe, MD prescribe under Medicare Part D?
In 2024, Marc G. Jaffe, MD had 821 Medicare Part D claims for 252 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.