Medical Oncology & Hematology
Dr. Staszewski served as Chief of the Oncology Hematology Division at Winthrop-University Hospital from 1996-2015, and is an Associate Professor of Clinical Medicine at SUNY Stony Brook.
After earning an M.D. from Yale University, Dr. Staszewski completed his residency training and fellowships at North Shore University Hospital, Long Island Jewish Medical Center and Memorial Sloan Kettering Cancer Center. Dr. Staszewski maintains active memberships with the American Society of Clinical Oncology, American Society of Hematology, and the American Association for Cancer Research. He has been recognized as an outstanding hematologist by his listing numerous times in the annual “Best Doctors” issue of New York Magazine. Dr. Staszewski was the principal investigator for a number of clinical trials in breast cancer, leukemia, myeloma, and colorectal cancers. He fosters innovation and research, particularly in cutting edge molecular diagnostic technology, helping to bring personalized medicine and bio-marker research from theory to reality.
He has published numerous articles in major peer-reviewed medical journals. During his 30+ year career in Medicine, Dr. Staszewski continues to develop and maintain the ongoing medical education of physicians and clinical staff. Dr. Staszewski has been closely involved in mentoring and teaching medical students, residents and sub-specialty fellows.
Dr. Staszewski’s clinical practice spans the entire spectrum of hematological and oncological disorders but he has a particular interest in hematological malignancies and colorectal cancer. At New York Cancer & Blood Specialists, Dr. Staszewski currently serves as Chief Medical Officer.
| John T Mather Memorial Hospital |
| Peconic Bay Medical Center |
| St. Catherine Of Siena Medical Center |
| St. Charles Hospital |
Patient Reviews
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"Dr. HARRY IS great doctor. He's kind, caring, brilliant and he listens. Always gives you his full attention even when he's running late."
from Ellen 5.0 Stars - (2024-11-16) -
"I love that I didn't have to wait to long to be seen , also the medical staff were very pleasant and the dr assistant was very understanding and respected my opinions and was not able to see my Dr Cyriac due to his emergency at a hospital, and the staff was very helpful and supportive at the front desk ! it's a pleasure coming there and knowing I can leave with a peaceful mind , Thank you all so much!!❤️"
from olympia 5.0 Stars - (2024-11-13) -
"Dr. Staszewski and his PAs don't return phone calls. I did my Dexa test in June of 2024, and I was diagnosed with Osteopenia, however nobody informed me about this until late September. Customer Service in East Setauket office is bad! They need to be trained! I left them several messages regarding prescription refill. I took forever to send it to my pharmacy."
from Vitals 1.0 Stars - (2024-10-14) -
"In and out very fast. Dr. answered all questions."
from James 5.0 Stars - (2024-10-08) -
"Clean, professional and efficient. Dr. Harry is the best"
from Leslie 5.0 Stars - (2024-10-01) -
"Very pleasant staff, attentive to needs of patient"
from Ken 5.0 Stars - (2024-09-21) -
"Polite and concerned medical professionals."
from edna 5.0 Stars - (2024-09-10) -
"Caring physician and staff"
from Ira 5.0 Stars - (2024-09-10) -
"Dr Harry Staszewski is the most competent oncologist you can get..He is very professional, yet so kind and empathic.I was blessed to have him as my doctor,going through Breast Cancer.
Even though I am a physician and understand a lot more about cancer as compared to a lay person.But going through a personal experience I realized how important a knowledgeable doctor is.And the importance of understanding and empathy for the patient is undeniable. I thank my doctor and his incredible team from the bottom of my heart ...And I pray for my doctors good health ,may he keep doing his incredible work for many years to come .The patients need doctors like you Dr Harry.!"
from Maryam 5.0 Stars - (2024-09-08) -
"Everyone from the assistant to the Doctor were very caring, making you feel very comfortable without any worries. The follow up Phone call was very reassuring …Everyone was excellent!"
from Carlo 4.0 Stars - (2024-08-28)