Dr Evan William Gwyn, MD - Medicare Internal Medicine in Boston, MA

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Dr Evan William Gwyn, MD is a medicare enrolled "Internal Medicine" physician in Boston, Massachusetts. He graduated from medical school in 2009 and has 15 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Massachusetts General Physicians Organization Inc and his current practice location is 55 Fruit Street, Hospital Medicine Unit, Blake 1500, Boston, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 724-3874.

Dr Evan William Gwyn is licensed to practice in Massachusetts (license number 240175) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1154558500.

Contact Information

Dr Evan William Gwyn, MD
55 Fruit Street, Hospital Medicine Unit, Blake 1500,
Boston, MA 02114
(617) 724-3874
(617) 724-9428

Map and Direction




Physician's Profile

Full NameDr Evan William Gwyn
GenderMale
SpecialityInternal Medicine
Experience15 Years
Location55 Fruit Street, Boston, Massachusetts
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Evan William Gwyn graduated from medical school in 2009
  NPI Data:
  • NPI Number: 1154558500
  • Provider Enumeration Date: 06/12/2009
  • Last Update Date: 11/20/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 8527216217
  • Enrollment ID: I20120921000692

Medical Identifiers

Medical identifiers for Dr Evan William Gwyn such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1154558500NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 240175 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Massachusetts General HospitalBoston, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Massachusetts General Physicians Organization Inc24663658203084

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. Dr Evan William Gwyn allows following entities to bill medicare on his behalf.
Entity NameMassachusetts General Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801874573
PECOS PAC ID: 2466365820
Enrollment ID: O20031111000434
Entity NameHarvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1194765438
PECOS PAC ID: 4486567104
Enrollment ID: O20031204000918
Entity NameBeth Israel Deaconess Medical Center Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548202641
PECOS PAC ID: 8123936119
Enrollment ID: O20041001000827
Entity NameThe General Hospital Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023049236
PECOS PAC ID: 6507803806
Enrollment ID: O20080313000351
Entity NameAssociated Physicians Of Harvard Medical Faculty Physicians At Beth Is
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1497151773
PECOS PAC ID: 6305749987
Enrollment ID: O20150211001099

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. Dr Evan William Gwyn 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
Dr Evan William Gwyn, MD
330 Brookline Ave, Span 2,
Boston, MA 02215

Ph: (617) 794-1338		Dr Evan William Gwyn, MD
55 Fruit Street, Hospital Medicine Unit, Blake 1500,
Boston, MA 02114

Ph: (617) 724-3874

Reviews and Comments


Internal Medicine Doctors in Boston, MA

Kaitlyn My-tu Lam, MBBS
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114
Phone: 617-724-7738    
Kui Toh Gerard Leong, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 55 Fruit Street, Massachusetts General Hospital, Boston, MA 02114
Phone: 617-726-8862    
Ruma Rajbhandari,
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 75 Francis St, Boston, MA 02115
Phone: 617-525-6841    
Alaka Ray, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114
Phone: 617-726-2066    
Meghan E Sise, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114
Phone: 617-726-2862    
Aaron Dickstein, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 800 Washington St, Box 233, Boston, MA 02111
Phone: 617-636-5883    Fax: 617-636-9292
Dr. Felicia Elizabeth Patch, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 801 Massachusetts Ave, Crosstown 2, Boston, MA 02118
Phone: 617-414-4376    Fax: 617-414-4676

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.