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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"Amazing staff, incredibly knowledgeable and puts your mind at ease. Dr Gruenstein is the absolute BEST there is."
from Johanna 5.0 Stars - (2024-11-19) -
"Can’t say enough about this practice!! Dr.Gruenstein is a rare find and is staff is wonderful!!! I live in CT…and if I lived in CA…I’d still get to him!!!"
from Sheri 5.0 Stars - (2024-11-14) -
"Dr. Gruenstein is not only a very good doctor, he is a caring and loving person. It is my good fortune to have him as my doctor."
from tova 5.0 Stars - (2024-11-07) -
"“Dr. Gruenstein is simply exceptional. He responded promptly to my concerns with the utmost compassion and care, as he always does. I can’t emphasize enough how professional and genuinely caring he is. If I could, I’d rate him and his center 10 stars out of 5! Dr. Gruenstein’s dedication and expertise truly set him apart – I’m grateful to have such a wonderful doctor."
from Mohsen 5.0 Stars - (2024-11-07) -
"Amazing!! Representative who answered phone listened and I felt assured I my emergency need for Dr’s assistance would be referred immediately and it was. Another representative telephoned me and said the Dr would call me at a scheduled time. He did call even earlier resolving my issue and relieved me of my worry and by the end of the I had a plan of resolution. A great Dr with a great team! Thankful!"
from Estelle 5.0 Stars - (2024-10-31) -
"Dr. G is the best doctor in the world! Compassionate and thorough."
from Keith 5.0 Stars - (2024-10-26) -
"Dr Gruenstien, is an one of the very best physicians I have and has been for the last 15 years. Always available, he has redefined the word compassionate and truly cares for each patient as if you are one of his family. Absolutely one of my best decision. I am also so grateful to the nursing staff, they are a blessing, who provide my infusions and the amazing suppourt staff who always have a smile for you when you come in."
from Peter 5.0 Stars - (2024-10-24) -
"The staff was friendly and helpful"
from Quintina 5.0 Stars - (2024-10-01) -
"Very kind and patient Doctor. I felt relaxed communicating with him."
from Sylvester 4.0 Stars - (2024-09-28) -
"We seeing this place yesterday with my wife Nusha and we very glad with the service and treatment. Hope will have more places like this. Keep up the good work.
Thank you."
from Mikel 5.0 Stars - (2024-09-27)