Marcus Mayus, MD - Medicare Internal Medicine in Greenwich, CT

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Marcus Mayus, MD is a medicare enrolled "Internal Medicine" physician in Greenwich, Connecticut. He went to New York Medical College and graduated in 2004 and has 20 years of diverse experience with area of expertise as Internal Medicine. His current practice location is 81 Holly Hill Ln Fl 3, Greenwich, Connecticut. You can reach out to his office (for appointments etc.) via phone at (203) 869-5515.

Marcus Mayus is licensed to practice in Connecticut (license number 045877) 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 1073734935.

Contact Information

Marcus Mayus, MD
81 Holly Hill Ln Fl 3,
Greenwich, CT 06830-6071
(203) 869-5515
(203) 661-2918

Map and Direction




Physician's Profile

Full NameMarcus Mayus
GenderMale
SpecialityInternal Medicine
Experience20 Years
Location81 Holly Hill Ln Fl 3, Greenwich, Connecticut
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:
  • Marcus Mayus attended and graduated from New York Medical College in 2004
  NPI Data:
  • NPI Number: 1073734935
  • Provider Enumeration Date: 05/01/2007
  • Last Update Date: 05/31/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 0345315180
  • Enrollment ID: I20080813000806

Medical Identifiers

Medical identifiers for Marcus Mayus such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1073734935NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 045877 (Connecticut)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Constellation HospiceOrange, CTHospice
Greenwich Hospital Association -Greenwich, CTHospital
Stamford HospitalStamford, CTHospital

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. Marcus Mayus allows following entities to bill medicare on his behalf.
Entity NameGandelman Cardiology, Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629264353
PECOS PAC ID: 1355437484
Enrollment ID: O20071019000351
Entity NameFrancis X Walsh Md Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902271729
PECOS PAC ID: 0143127472
Enrollment ID: O20160127002673
Entity NameMurphy Medical Associates Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1669877635
PECOS PAC ID: 4385921220
Enrollment ID: O20190404001540
Entity NameMarcus Mayus Md Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1780341743
PECOS PAC ID: 6507258688
Enrollment ID: O20220124000123

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. Marcus Mayus 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
Marcus Mayus, MD
81 Holly Hill Ln Fl 3,
Greenwich, CT 06830-6071

Ph: (203) 884-8420		Marcus Mayus, MD
81 Holly Hill Ln Fl 3,
Greenwich, CT 06830-6071

Ph: (203) 869-5515

Reviews and Comments


Internal Medicine Doctors in Greenwich, CT

Dr. Nicholas Harrison Browning, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 75 Holly Hill Ln, Greenwich, CT 06830
Phone: 203-863-3400    
Francesca Montanari, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 77 Lafayette Pl, Greenwich, CT 06830
Phone: 203-863-3700    
Dr. Lisa Kurian, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 75 Holly Hill Ln, Greenwich, CT 06830
Phone: 203-869-6960    Fax: 203-869-5103
Dr. Steven Smith, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5 Perryridge Rd, Greenwich, CT 06830
Phone: 203-863-3911    
Dr. Marcelyn Carol Molloy, MD
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 75 Holly Hill Ln, Greenwich, CT 06830
Phone: 203-869-6960    Fax: 203-869-5103
Dr. Alexander Delvecchio, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 55 Holly Hill Ln, Suite 240, Greenwich, CT 06830
Phone: 203-863-4210    Fax: 203-622-1872
Dr. Sunil Rana, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 49 Lake Ave Ste 2, Greenwich, CT 06830
Phone: 203-869-7704    Fax: 203-661-8596

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.