Steven Gruenstein, M.D.
Quick Facts
| Practice Type | Concierge |
| Doctors | Steven Gruenstein M.D., Oncology |
About
At Steven Gruenstein, M.D., Dr. Steven Gruenstein brings triple board certification in Medical Oncology, Hematology, and Internal Medicine to a focused concierge program. He serves patients across the NY Metropolitan area from his Upper East Side office at 12 East 86th Street.
Dr. Gruenstein holds an appointment as Associate Clinical Professor of Medicine at the Mount Sinai School of Medicine. He treats breast cancer, hematologic malignancies, GI malignancies, and benign hematologic conditions. Members receive same-day or next-day appointments, a personalized annual health evaluation, and direct access to Dr. Gruenstein after hours and on weekends. He also coordinates care with specialists and assists members with pharmacy and insurance matters.
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Frequently Asked Questions
Members receive a comprehensive suite of personalized services. Dr. Gruenstein provides a customized annual health evaluation that covers nutritional and psychological appraisals. Members also get same-day or next-day appointments, longer visits that start on time, and direct access to Dr. Gruenstein via his private cell phone after hours and on weekends. The practice handles facilitation with pharmacies and insurance claims on behalf of members.
Yes. Dr. Gruenstein gives members his private cell phone number for after-hours and weekend contact. For non-urgent matters, members can also reach him by email. The practice provides members with a dedicated office telephone number exclusively for their use.
Yes. Dr. Gruenstein personally communicates all test and laboratory results to his members. He takes time to walk through findings and answer questions directly, rather than routing that information through staff.
Dr. Gruenstein focuses on breast cancer, hematologic malignancies, and GI malignancies. He also treats other types of cancer and serves as an expert in benign hematology. His Internal Medicine board certification supports comprehensive primary care alongside his oncology and hematology work.
Yes. Dr. Gruenstein actively coordinates care with specialists and other health providers on behalf of his members. He takes the lead on overall health management, connecting patients to the right providers and keeping communication clear throughout.
Prospective patients can contact the practice directly by phone or through the online contact form. The office number is (212) 861-6660 and the Member Services line is (877) 888-5565. A staff member will follow up to discuss the program and next steps.
Yes. Dr. Gruenstein provides each member with a personalized annual health evaluation. He tailors it around each patient's unique needs, with attention to the current state of illness and future treatment planning. The evaluation includes nutritional and psychological appraisals customized to the individual.
Practice last updated March 21, 2026