Marisa Gefen, M.D.
NPI 1386846806 · Internal Medicine Physician · Philadelphia, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marisa Gefen, M.D. is a Internal Medicine Physician provider in Philadelphia, PA (NPI 1386846806).
Provider details
- NPI number
- 1386846806
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- MD439866 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
38 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 25 | $58 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 13 | $133 |
Typical Medicare-allowed amounts for these services range $58–$133 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 121 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 659 | 135 |
| Amlodipine Besylate | 484 | 99 |
| Omeprazole | 246 | 49 |
| Losartan Potassium | 228 | 41 |
| Duloxetine Hcl | 226 | 43 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 225 | 43 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$58 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1113 Carlisle RdYork, PA 17404-4939Phone: (717) 200-1567Fax: (717) 674-6145
Registry dates
- Enumerated
- 2007-06-05
- Last updated
- 2025-04-30
- Certified
- 2025-04-30
Frequently asked questions
- What is Marisa Gefen's NPI number?
- Marisa Gefen's National Provider Identifier (NPI) is 1386846806, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marisa Gefen's specialty?
- Marisa Gefen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marisa Gefen located?
- Marisa Gefen's practice location on file with NPPES is 37 S 40th St, Philadelphia, PA 19104-3042.
- What is Marisa Gefen's phone number?
- The practice phone number listed in the NPPES registry for Marisa Gefen is (215) 444-7470.
- Does Marisa Gefen accept Medicare?
- Marisa Gefen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marisa Gefen's NPI active?
- Yes — Marisa Gefen's NPI (1386846806) is active in the NPPES registry as of the last update on 2025-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.