Marc Fenster, MD
NPI 1144751595 · Gastroenterology Physician · Cedarhurst, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Fenster, MD is a Gastroenterology Physician provider in Cedarhurst, NY (NPI 1144751595).
Provider details
- NPI number
- 1144751595
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 302653 (NY)
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
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
19 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 19 | $145 |
Typical Medicare-allowed amounts for these services range $145–$145 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 116 | 52 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 94 | 90 |
| Esomeprazole Magnesium | 62 | 25 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 43 | 41 |
| Pantoprazole Sodium | 29 | 12 |
| Linaclotidebrand: Linzess | 27 | 11 |
| Sod Sulf/Pot Chloride/Mag Sulf |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,977 across 65 records (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
Registry dates
- Enumerated
- 2017-03-27
- Last updated
- 2023-08-23
- Certified
- 2023-08-23
Frequently asked questions
- What is Marc Fenster's NPI number?
- Marc Fenster's National Provider Identifier (NPI) is 1144751595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Fenster's specialty?
- Marc Fenster is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Fenster located?
- Marc Fenster's practice location on file with NPPES is 657 Central Ave, Cedarhurst, NY 11516-2320.
- What is Marc Fenster's phone number?
- The practice phone number listed in the NPPES registry for Marc Fenster is (516) 374-5570.
- Does Marc Fenster accept Medicare?
- Marc Fenster is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Fenster's NPI active?
- Yes — Marc Fenster's NPI (1144751595) is active in the NPPES registry as of the last update on 2023-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.