Felice R Zwas, MD - Medicare Gastroenterology in Greenwich, CT

Felice R Zwas, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Greenwich, Connecticut. She went to Columbia University College Of Physicians And Surgeons and graduated in 1980 and has 44 years of diverse experience with area of expertise as Gastroenterology. She is a member of the group practice Connecticut Gi Pc and her current practice location is 500 W Putnam Ave, Suite 100, Greenwich, Connecticut. You can reach out to her office (for appointments etc.) via phone at (203) 863-2900.

Felice R Zwas is licensed to practice in Connecticut (license number 028878) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1225059116.

Contact Information

Felice R Zwas, MD
500 W Putnam Ave, Suite 100,
Greenwich, CT 06830-6086
(203) 863-2900
(203) 863-2901

Map and Direction




Physician's Profile

Full NameFelice R Zwas
GenderFemale
SpecialityGastroenterology
Experience44 Years
Location500 W Putnam Ave, Greenwich, Connecticut
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Felice R Zwas attended and graduated from Columbia University College Of Physicians And Surgeons in 1980
  NPI Data:
  • NPI Number: 1225059116
  • Provider Enumeration Date: 07/23/2006
  • Last Update Date: 07/08/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 1759480353
  • Enrollment ID: I20101004001235

Medical Identifiers

Medical identifiers for Felice R Zwas such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1225059116NPI-NPPES
010028878CT01OtherCTANTHEM
028878OtherCTCOMMERCIAL
1288788MedicaidCT

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 028878 (Connecticut)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Greenwich Hospital Association -Greenwich, CTHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Connecticut Gi Pc9830110758185

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Felice R Zwas allows following entities to bill medicare on her behalf.
Entity NameConnecticut Gi Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023124625
PECOS PAC ID: 9830110758
Enrollment ID: O20070112000011
Entity NameCenter For Gastrointestinal Medicine Of Fairfield & Westchester, P.c.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1003837907
PECOS PAC ID: 0143111989
Enrollment ID: O20070622000104

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Felice R Zwas is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Felice R Zwas, MD
500 W Putnam Ave, Suite 100,
Greenwich, CT 06830-6086

Ph: (203) 863-2900
Felice R Zwas, MD
500 W Putnam Ave, Suite 100,
Greenwich, CT 06830-6086

Ph: (203) 863-2900

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.