Medical Oncology & Hematology
Dr Steven Gruenstein is an Associate Clinical Professor of Medicine, in Hematology and Medical Oncology, at the Mount Sinai School of Medicine. He is an Attending Physician both at Mount Sinai and Lenox Hill.
Dr Gruenstein completed his sub specialty training at Beth Israel Hospital after which he became board certified in Medical Oncology, Hematology and earlier in Internal Medicine. He is a member of the American Society of Clinical Oncology, the American Society of Hematology, American Society of Breast Diseases among others.
Dr Gruenstein is recognized throughout the NY Metropolitan as an outstanding clinical Hematologist/Oncologist dedicated to his patients’ wellbeing. He is their advocate. He is also known for kindness and compassion which is evident immediately upon meeting him. He has been honored with citations in New York Magazine’s Best Doctor’s, Castle Connelly’s Best Doctors in US and NY, Patients’ Choice and Compassionate Doctor’s Awards. He has been described, interviewed and quoted in books, magazines and newspapers. He has published extensively in his field.
Dr. Gruenstein is especially interested in hematological malignancies, benign hematology and solid tumors especially gastrointestinal, genitourinary and breast cancer. He treats other cancers as well, and is an expert in benign hematology. He teaches at both Mount Sinai and Lenox Hill, lecturing on many topics, directing tumor boards and serving on various hospital administrative boards. For patients seeking more time and personalized attention, Dr Gruenstein offers a special Concierge Service.
| Lenox Hill Hospital |
| Mount Sinai Manhattan |
Patient Reviews
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"Wonderful Doctor and an Amazing Staff !"
from jesus 5.0 Stars - (2024-04-30) -
"Very professional and caring experience"
from Rochelle 5.0 Stars - (2024-04-27) -
"Crossing the river...from health to healthcare maintenence is a big step....I was subject to 7 vials of blood sample tests...then after the Doctors exam, 3 more! Mucho sangre, whats going on...after bloodwork analysis...I will feel comfortable proceeding in a 6 month Chemotherapy journey if I am not completely cancer free. My lymph nodes all were clear...I am not anxious to follow a computer report from some Doctors ideas with out full spectrum review/analysis."
from Frank 3.0 Stars - (2024-04-20) -
"Waiting for over a hour after my appointment to see the doctor and is not a first time it happened."
from Pete 1.0 Stars - (2024-04-20) -
"The staff is patient, efficient & clear both upon entry & afterwards for future appts.My blood work didn’t show change & therefore a simple “chat” with a PA precluded needing Dr. G’s consultation."
from Sandra 5.0 Stars - (2024-04-19) -
"I am a physician. There is nobody better than Dr Gruenstein and his staff. Incomparable. A patient for 12 years. 🙏🙏"
from xLester 5.0 Stars - (2024-04-17) -
"Dr Gruenstein is a brilliant, and caring doctor.
He has my highest recommendation."
from Michael 5.0 Stars - (2024-04-17) -
"Dr. Gruenstein is so compassionate with his patients, he shows genuine care for his patients from the time you walk into the office, right up to the second you leave! He has old-world doctoring mannerisms!"
from Harry 5.0 Stars - (2024-04-16) -
"I met with Dr. Gruenstein today for the first time, and he was professional, kind, and knowledgeable-- all things that you would want in a physician. He took his time answering my questions and the appointment never felt rushed. The office staff is helpful and efficient. I highly recommend Dr. Gruenstein and glad to be under his care."
from Kathy 5.0 Stars - (2024-04-12) -
"Dr Gruenstein is excellent doctor. He cares so much for his patients. I am so happy I have him."
from Robin 5.0 Stars - (2024-04-11)