
Greenwich Medical Concierge
Quick Facts
| Practice Type | Concierge |
| Location | Greenwich, Westchester County, Fairfield County |
| Doctors | Marcus Mayus MD, Primary Care |
| Telehealth Type | 24/7 direct telephone access, email access, round-the-clock telemedicine |
| Housecalls | Yes |
| Telehealth Available | Yes |
About
At Greenwich Medical Concierge, Dr. Marcus Mayus delivers primary care to members across Greenwich, Westchester County, and Fairfield County. He has served the Greenwich community for over 15 years. The practice holds hospital affiliations with Greenwich Hospital and Stamford Hospital.
Membership stays intentionally limited to preserve continuity and personal attention. Members reach Dr. Mayus directly by cell phone or email, around the clock, every day of the year. The practice offers same-day visits, before- and after-work appointments, house calls, and telemedicine. Clinical services extend well beyond routine primary care. Dr. Mayus provides advanced cancer screening, cardiac and pulmonary screening, anti-aging medicine, bio-identical hormone therapy, testosterone replacement therapy, weight loss management, and pharmacogenomic screening. Diagnostic tools include the Ezra Whole Body MRI, the Galleri multi-cancer early detection blood test, and genetic hereditary cancer testing covering 48 genes across 11 cancer types. When specialist care is needed, Dr. Mayus secures appointments within a day, sometimes within minutes.
Details
Address
81 Holly Hill, 3rd Floor, Greenwich, CT 06830
Website
Visit websiteMembership Details
Individual and Family plan membership options available. Limited membership. Pricing not listed on website.
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Frequently Asked Questions
Prospective members apply through the practice's online application form. After submitting, the office manager contacts applicants within 48 hours to discuss next steps. Membership is limited, so the practice reviews each application before confirming enrollment.
Greenwich Medical Concierge offers both Individual and Family plan membership options. The Family plan extends the same level of access and personalized care to every member of a household. Pricing is not listed publicly; the office provides details during the enrollment conversation.
Yes. Members receive Dr. Mayus's direct cell phone number and personal email address. He is reachable by call or text 24 hours a day, 365 days a year. Members use email for non-urgent questions and receive a timely response.
Yes. Greenwich Medical Concierge schedules same-day visits with no wait time. The practice also offers before-work and after-work appointment slots. Members who need care at home can request a house call.
The practice offers an extensive range of advanced diagnostics. Cancer screening covers pancreatic, colon, prostate, testicular, multiple myeloma, lymphoma, and leukemia. Cardiac screening includes cardiac imaging, aneurysm screening, vascular disease evaluation, and Afib detection. Additional options include the Ezra Whole Body MRI, the Galleri multi-cancer blood test, genetic hereditary cancer testing, pulmonary CT scans, and pharmacogenomic screening.
Yes. When a specialist is needed, Dr. Mayus secures appointments within a day, and sometimes within minutes. He also arranges on-site specialist consultations or in-home visits when appropriate. The practice maintains in-house specialist access for conditions including heart disease, sleep apnea, stroke, arrhythmia, high blood pressure, and surgical weight management.
Yes. Greenwich Medical Concierge provides round-the-clock telemedicine access for members. Telehealth visits complement in-office and house call options, giving members flexibility in how they access care.
Dr. Mayus offers a structured weight loss management program for members. The program includes FDA-approved medications such as Ozempic, Wegovy, and Mounjaro. The practice also coordinates access to medical and surgical weight management specialists when clinically appropriate.
Yes. Greenwich Medical Concierge welcomes members from Westchester County and Fairfield County in addition to Greenwich residents. The practice sits conveniently close to both areas.
Practice last updated March 21, 2026

