Dr. Felice R. Zwas, MD
- Medicare services, 2024
- 886
- Medicare patients, 2024
- 522
- Part D claims, 2024
- 959
- MIPS score, 2024
- 92
- Hospital affiliations
- 1
- Practice address
- 15 Valley Dr, Greenwich, CT 06831
- Practice phone
- Call (860) 246-2571
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Connecticut GI
Greenwich, Connecticut
Find Dr. Zwas' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Felice R. Zwas is a gastroenterologist in Greenwich, Connecticut
Dr. Zwas practices at Connecticut GI in Greenwich, Connecticut.
Dr. Zwas' NPI, 1225059116, was assigned on July 23, 2006. Dr. Zwas graduated from Columbia University Vagelos College of Physicians and Surgeons in 1980. Dr. Zwas holds Connecticut license 028878.
- NPI
- 1225059116NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1759480353
- NPI enumeration date
- July 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (860) 246-2571
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Felice R. Zwas practices at Connecticut GI in Greenwich, Connecticut
Dr. Zwas' primary practice is Connecticut GI, at 15 Valley Dr, Greenwich, CT 06831 in Western Ct County. The practice phone is (860) 246-2571.
- Connecticut GI15 Valley Dr, Greenwich, CT 06831 · Western Ct CountyPhone(860) 246-2571
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Felice R. Zwas is affiliated with 4 sites of care and 2 medical groups
Dr. Zwas' primary practice is Connecticut GI in Greenwich, Connecticut. Dr. Zwas is also affiliated with Greenwich Hospital. The medical group on file is Connecticut GI. Dmand AI also links Dr. Zwas to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Felice R. Zwas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zwas practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Connecticut GI | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Felice R. Zwas is one of 298 gastroenterologists in Connecticut
Gastroenterology is Dr. Zwas' primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Zwas is licensed in Connecticut.
Specialties and state licenses
- Gastroenterology, ConnecticutPrimary
Gastroenterologists near Dr. Zwas
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Felice R. Zwas billed Medicare for 886 services in 2024
CMS data shows 886 Medicare services from Dr. Zwas across 14 procedure codes in 2024, for 522 Medicare patients. Medicare paid $91,065 for them.
Dr. Zwas' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 3472024: 3789%
- Office and hospital visits
- 2023: 4122024: 36212%
- Other services
- 2023: 952024: 6631%
- Drugs given in the office
- 2023: 422024: 432%
- Tests and treatments
- 2023: 02024: 37
Where Dr. Zwas' Medicare services took place, 2024
- In an office44250%
- In a facility44450%
Dr. Zwas compared with the Connecticut median for gastroenterologists, 2024
- Dr. Zwas
- Connecticut median
- Medicare services
- 886vs 3612.5 times
- Medicare patients
- 522vs 2532.1 times
- Part D claims
- 770vs 53843% above
Medians across 284 gastroenterologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Zwas' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Felice R. Zwas treated 522 Medicare patients in 2024, average age 73
CMS counts 522 Medicare patients who saw Dr. Zwas in 2024. The largest group is 65 to 74, with 307 patients. 75% of them have high cholesterol, and 52% have high blood pressure. 3% are also on Medicaid. Their average risk score is 0.78, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Zwas' median patient age at 66, with 73% women.
Dr. Zwas' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Zwas' Medicare patients by sex, 2024
- Women39475%
- Men12825%
Chronic conditions among Dr. Zwas' Medicare patients, 2024
- High cholesterol75%
- High blood pressure52%
- Arthritis49%
- Osteoporosis26%
- Anxiety21%
- Cancer17%
- Mood disorders16%
- Ischemic heart disease14%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zwas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women73%
- Men23%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Felice R. Zwas wrote 959 Medicare Part D claims in 2024
In 2024, Dr. Zwas wrote 959 Medicare Part D claims for 259 patients. 83% of them were for generic drugs. CMS names the drug for 770 of them, across 18 drugs with 11 or more claims each, at $800,054 in total drug cost. In 2023, CMS named 892 claims across 18 drugs.
Dr. Zwas' Part D claims by kind of drug, 2024
- Generic798 claims83%
- Brand-name161 claims17%
Dr. Zwas' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Zwas' Part D claims, 2024
- Antibiotics3%26 of 959 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8922024: 77014%
Drugs named by CMS: 18 in 2024, 18 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Felice R. Zwas scored 92 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 92 out of 100 for Dr. Zwas for performance year 2024, reported as part of a group. Dr. Zwas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Zwas as offering telehealth. CMS counts 215 procedures of colonoscopy by Dr. Zwas, more than 94% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Zwas' MIPS scores, performance year 2024
- 92of 100Final score
- 89.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Zwas ranks in Medicare procedure volume
- Colonoscopy
- 94th percentile215 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 77th percentile102 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Felice R. Zwas received $8,514 in industry payments from 2016 to 2025
CMS Open Payments shows 490 general payments to Dr. Zwas from 35 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 95% of the total. Abbvie Inc. paid the most, $1,066.
General payments to Dr. Zwas by program year, 2016 to 2025
General payments to Dr. Zwas by kind, 2016 to 2025
- Food and beverage$8,11795%
- Entertainment$3975%
Companies that paid Dr. Zwas the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Felice R. Zwas graduated from Columbia University Vagelos College of Physicians and Surgeons
Dr. Zwas graduated from Columbia University Vagelos College of Physicians and Surgeons in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Felice R. Zwas's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Felice R. Zwas
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Felice R. Zwas' NPI number?
Dr. Felice R. Zwas' NPI number is 1225059116. It was assigned on July 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Felice R. Zwas?
Dr. Felice R. Zwas is a gastroenterologist in Greenwich, Connecticut. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Felice R. Zwas practice?
Dr. Zwas practices at 15 Valley Dr, Greenwich, CT 06831. Dr. Zwas' primary practice is Connecticut GI in Greenwich, Connecticut. Dmand AI also links Dr. Zwas to 2 group practices and clinics and 1 medical group.
What is Dr. Felice R. Zwas' office phone number?
The practice phone on file for Dr. Zwas is (860) 246-2571.
What is Dr. Felice R. Zwas' medical license number?
Dr. Zwas holds Connecticut license 028878.
Which hospitals is Dr. Felice R. Zwas affiliated with?
Dr. Zwas is affiliated with Greenwich Hospital.
What medical group is Dr. Felice R. Zwas part of?
Dr. Zwas is linked to Connecticut GI. Dmand AI links Dr. Zwas to 1 more medical group.
Does Dr. Felice R. Zwas accept Medicare?
Yes. CMS data shows Dr. Zwas billed Medicare for 886 services in 2024, and Dr. Zwas accepts Medicare assignment.
Does Dr. Felice R. Zwas offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Zwas as offering telehealth services.
What is Dr. Felice R. Zwas' MIPS score?
Dr. Zwas' MIPS final score for performance year 2024 is 92 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Felice R. Zwas see?
CMS counts 522 Medicare patients who saw Dr. Zwas in 2024, with an average age of 73.
What services does Dr. Felice R. Zwas bill to Medicare?
In 2024, Dr. Zwas' most billed Medicare services were surgery: digestive system (45380), office visit, established patient (99214) and surgery: digestive system (43239).
Where did Dr. Felice R. Zwas go to medical school?
Dr. Zwas graduated from Columbia University Vagelos College of Physicians and Surgeons in 1980.
What drugs does Dr. Felice R. Zwas prescribe most?
In 2024 Medicare Part D data, Dr. Zwas' most prescribed drugs by claims were Pantoprazole Sodium, Famotidine and Omeprazole.
Has Dr. Felice R. Zwas received payments from drug or device companies?
CMS Open Payments shows $8,514 in general payments to Dr. Zwas from 35 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Felice R. Zwas been practicing?
Dr. Zwas graduated from medical school in 1980, 46 years ago.
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