Robert J Master, MD - Medicare Internal Medicine in Cambridge, MA

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Robert J Master, MD is a medicare enrolled "Internal Medicine" physician in Cambridge, Massachusetts. His current practice location is 9a Forest St, Cambridge, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 680-6892.

Robert J Master is licensed to practice in Massachusetts (license number 35355) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1518048131.

Contact Information

Robert J Master, MD
9a Forest St,
Cambridge, MA 02140-1501
(617) 680-6892
(857) 678-4049

Map and Direction




Physician's Profile

Full NameRobert J Master
GenderMale
SpecialityInternal Medicine
Location9a Forest St, Cambridge, Massachusetts
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1518048131
  • Provider Enumeration Date: 10/18/2006
  • Last Update Date: 09/17/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 7517916851
  • Enrollment ID: I20050125000468

Medical Identifiers

Medical identifiers for Robert J Master such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1518048131NPI-NPPES
66923UHOtherMAHPHC NUMBER
M08434OtherMABCBS NUMBER
0138401MedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 35355 (Massachusetts)Primary

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. Robert J Master allows following entities to bill medicare on his behalf.
Entity NameBostons Community Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1235174418
PECOS PAC ID: 1355390691
Enrollment ID: O20050113000756
Entity NameNewvision Healthcare Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1215521091
PECOS PAC ID: 3476962325
Enrollment ID: O20210506001080
Entity NameCovid Safe At Home, Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548995103
PECOS PAC ID: 8426433384
Enrollment ID: O20220914001002

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. Robert J Master 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
Robert J Master, MD
9a Forest St,
Cambridge, MA 02140-1501

Ph: (617) 680-6892		Robert J Master, MD
9a Forest St,
Cambridge, MA 02140-1501

Ph: (617) 680-6892

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.