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Dr. Steven Montana

Medical Oncology & Hematology

Steven Montana, DO is board certified in hematology and medical oncology. He has been a practicing medical hematologist and oncologist on Long Island, NY since 1998.

Dr. Montana received his Bachelor’s degree in Biology from Hofstra University in Hempstead, before attending The New York College of Osteopathic Medicine in Old Westbury, NY where he received his D.O. During this time, he also completed a rotating internship at Saint Clare’s Hospital and Medical Center. Following his internship, Dr. Montana completed his Internal Medical Residency at Saint Vincent’s Hospital and Medical Center and then continued to Stony Brook University for his fellowship where he participated in basic science cancer research studies.

Since then, Dr. Montana has been the co-author of several medical publications. Dr. Montana treats patients at our Port Jefferson and Smithtown offices. Many of his special areas of interest include gastrointestinal cancers, lung cancer, lymphoma, and malignant/nonmalignant hematology.

Credentials:  DO
Education & Training
   FACP:    State University of New York at Stony Brook
    Residency:    St. Vincent's Hospital and Medical Center
    Medical School:    New York College of Osteopathic Medicine
    College:    Hofstra University


John T Mather Memorial Hospital
Peconic Bay Medical Center
Southside Hospital
St. Catherine Of Siena Medical Center
St. Charles Hospital

Patient Reviews

  • "Dr. Montana is an awesome doctor. He takes his time, answers every question, and has the best bedside manners. I've been going to him for at least 10 years and I highly recommend him."
      from Maryellen 5.0 Stars - (2025-07-09)
  • "Everyone is very professional and caring"
      from judy 5.0 Stars - (2025-07-04)
  • "I’ve been seeing Dr. Montana since 2012. He always takes time With you making sure that all your needs are met never rushes you out always checks up on everything to see if there’s any need you have and will always contact doctors if you want him to refer you. If there are any lab results that need to be discussed, he personally calls me Everything to me, I wouldn’t trade them for anything. He’s very professional and I recommend him to anyone. Barbara D."
      from Barbara 5.0 Stars - (2025-06-27)
  • "Dr. Montana was amazing. This was my first time in this office and with Dr. Montana. He was very knowledgable but not condescending, like I have experienced with other doctors in the past. He helped me to feel like I was in good hands. I have been so nervous about my pain and it was great to feel like I was finally getting to the root of it with someone who cares."
      from danielle 5.0 Stars - (2025-06-24)
  • "Always on time and excellent service"
      from santos 5.0 Stars - (2025-06-24)
  • "Dr Montana is wonderful always listens to you and ready to help you however he can the staff is so kind and helpful"
      from Sharon 5.0 Stars - (2025-06-20)
  • "Great staff. Caring and very attentive to your needs. Have been a patient there for many years and I have never had one issue. Dr. Decosta and his Aid of fabulous and caring. Thank you for your service."
      from Keith 5.0 Stars - (2025-06-19)
  • "Everyone was so professional and so helpful. Made me feel very comfortable."
      from karen 5.0 Stars - (2025-06-15)
  • "Amazing staff always ready to help you with any problem you have. Dr Montana is an incredible doctor. We always leave knowing exactly what's happening. Never rushes you and talks to you like family. I would highly recommend Dr. Montana and his office"
      from dawn 5.0 Stars - (2025-06-06)
  • "Very professional."
      from Lee 5.0 Stars - (2025-06-01)