Marc Jaffe, MD
NPI 1770661308 · Endocrinology, Diabetes & Metabolism Physician · South San Francisco, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Jaffe, MD is a Endocrinology, Diabetes & Metabolism Physician provider in South San Francisco, CA (NPI 1770661308).
Provider details
- NPI number
- 1770661308
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A46300 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 142 | 51 |
| Methimazole | 79 | 33 |
| Alendronate Sodium | 61 | 25 |
| Teriparatidebrand: Forteo | 39 | — |
| Testosterone | 39 | 17 |
| Semaglutidebrand: Ozempic | 33 | 11 |
| Insulin Glargine-Yfgn | 25 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-13
Frequently asked questions
- What is Marc Jaffe's NPI number?
- Marc Jaffe's National Provider Identifier (NPI) is 1770661308, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Jaffe's specialty?
- Marc Jaffe is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Jaffe located?
- Marc Jaffe's practice location on file with NPPES is 1200 El Camino Real, South San Francisco, CA 94080-3208.
- What is Marc Jaffe's phone number?
- The practice phone number listed in the NPPES registry for Marc Jaffe is (650) 742-2000.
- Does Marc Jaffe accept Medicare?
- Marc Jaffe is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Jaffe's NPI active?
- Yes — Marc Jaffe's NPI (1770661308) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.