Felice Zwas, M.D.
NPI 1225059116 · Gastroenterology Physician · Greenwich, CT
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Felice Zwas, M.D. is a Gastroenterology Physician provider in Greenwich, CT (NPI 1225059116).
Provider details
- NPI number
- 1225059116
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 028878 (CT)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
843 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) |
|---|---|---|
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 181 | $178 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 158 | $133 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 131 | $96 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 95 | $117 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 41 | $96 |
| New Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 15 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 317 | 107 |
| Famotidine | 151 | 58 |
| Omeprazole | 44 | 15 |
| Ondansetronbrand: Ondansetron Odt | 40 | 21 |
| Mesalamine | 30 | — |
| Linaclotidebrand: Linzess | 21 | — |
| Ustekinumabbrand: Stelara | 19 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$625 across 34 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
- 2006-07-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Felice Zwas's NPI number?
- Felice Zwas's National Provider Identifier (NPI) is 1225059116, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Felice Zwas's specialty?
- Felice Zwas is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Felice Zwas located?
- Felice Zwas's practice location on file with NPPES is 500 W Putnam Ave, Greenwich, CT 06830-6086.
- What is Felice Zwas's phone number?
- The practice phone number listed in the NPPES registry for Felice Zwas is (203) 863-2900.
- Does Felice Zwas accept Medicare?
- Felice Zwas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Felice Zwas's NPI active?
- Yes — Felice Zwas's NPI (1225059116) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.