Marianne Fahmy, M.D.
NPI 1033321211 · Internal Medicine Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marianne Fahmy, M.D. is a Internal Medicine Physician provider in La Jolla, CA (NPI 1033321211).
Provider details
- NPI number
- 1033321211
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A94894 (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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 114 | 102 |
| Omeprazole | 86 | 33 |
| Mesalamine | 31 | 12 |
| Pantoprazole Sodium | 28 | 11 |
| Balsalazide Disodium | 20 | — |
| Adefovir Dipivoxil | 12 | — |
| Metronidazole | 12 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-03
- Last updated
- 2021-12-13
- Certified
- 2021-12-13
Frequently asked questions
- What is Marianne Fahmy's NPI number?
- Marianne Fahmy's National Provider Identifier (NPI) is 1033321211, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marianne Fahmy's specialty?
- Marianne Fahmy is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marianne Fahmy located?
- Marianne Fahmy's practice location on file with NPPES is 3350 La Jolla Village Dr, La Jolla, CA 92037-1806.
- What is Marianne Fahmy's phone number?
- The practice phone number listed in the NPPES registry for Marianne Fahmy is (858) 552-8585.
- Does Marianne Fahmy accept Medicare?
- Marianne Fahmy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marianne Fahmy's NPI active?
- Yes — Marianne Fahmy's NPI (1033321211) 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.