Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Marcus Mayus MD Inc

Organization Internal Medicine Physician · NPI 1780341743

Marcus Mayus MD Inc is an Internal Medicine Physician in Greenwich, Connecticut. Registered with an NPI since 2021.

In the registry since
2021
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

81 Holly Hill Ln Fl 3
Greenwich, CT 06830-6071
Phone: (203) 869-5515
Fax: (203) 869-5765
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X

Record details

NPI number1780341743
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Marcus Mayus — Physician/Owner · (203) 869-5515
NPI enumeratedNovember 24, 2021
Last updated in NPPESNovember 24, 2021
Certification dateNovember 24, 2021
Mailing address81 Holly Hill Ln Fl 3, Greenwich, CT 06830-6071

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