MD² Gramercy Park
Quick Facts
| Practice Type | Concierge |
| Location | Gramercy Park, Manhattan |
| Doctors | Costas Hanjis MD, Internal Medicine, Melissa Sum MD, FACE, Internal Medicine |
About
At MD² Gramercy Park, two physicians with deep roots in New York medicine will open their doors in spring 2026. Dr. Costas Hanjis and Dr. Melissa Sum bring complementary expertise across internal medicine, endocrinology, metabolic health, and women's health. The practice sits just off Gramercy Park, steps from Park Avenue and Irving Place in one of Manhattan's most storied neighborhoods.
The MD² philosophy holds that meaningful, personal relationships between physician and patient form the foundation of the best care. Dr. Hanjis brings over two decades of internal medicine experience and a particular focus on preventive health and cancer survivor care. Dr. Sum is a board-certified endocrinologist and Fellow of the American Association of Clinical Endocrinology with deep expertise in hormonal disorders and metabolic health. Together, they build lifestyle-focused care plans tailored to each patient's goals, values, and long-term wellness.
Details
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Frequently Asked Questions
The all-inclusive monthly fee is $2,500 for an individual. Family members can join at an additional cost. The fee covers unlimited access to your physician and their physician partner, along with all care and services the office provides. MD² Gramercy Park does not bill insurance or Medicare for membership.
MD² Gramercy Park does not bill insurance or Medicare. The monthly membership fee covers all primary care services the practice provides, with no additional billing for office visits, diagnostics, or care coordination.
Each physician at MD² limits their panel to just 50 families. That small panel allows each doctor to know their patients deeply and remain genuinely available when medical issues arise.
The membership covers every primary care service with no additional billing. This includes an extensive annual physical, unlimited visits, house and workplace calls, x-rays, and routine lab tests and diagnostics suited to each patient's age and health status. Members receive absolute, unlimited access to their physician and their physician partner.
MD² does not bind patients to a contract. The only agreement the practice uses reflects its promise to you. You can cancel at any time without any financial commitment. If you choose to leave, your physician will help you establish care with another doctor of your choosing.
MD² Gramercy Park opens in spring 2026. The practice is located at 902 Broadway, Suite 1603, New York, NY 10010, just off Gramercy Park near Park Avenue and Irving Place. com to inquire about membership.
Dr. Costas Hanjis focuses on internal medicine, preventive health, chronic disease management, and cancer survivor care. Dr. Melissa Sum specializes in endocrinology, metabolic health, women's health, and hormonal disorders including menopause. Together, they cover a broad range of primary care and specialty needs within a single practice.
Your membership gives you access to both physicians. MD² structures its practices so that your primary doctor and their physician partner both know you and remain available to you. This means you always have an expert who understands your medical history when you need care.
Practice last updated March 21, 2026