Steven L
Allen, MD

Hematology, Medical Oncology, Internal Medicine

(516) 734-8959

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About your doctor:

Member of Northwell Health Physician Partners
Languages spoken:


Dr. Allen is Professor of Medicine at Hofstra North Shore-LIJ School of Medicine. He is Associate Chief, Division of Hematology, Department of Medicine and Attending Physician, Division of Medical Oncology/Hematology at Monter Cancer Center, North Shore-LIJ Health System. He is also an Associate Investigator at North Shore-Long Island Jewish Research Institute. Dr. Allen is board certified in internal medicine, hematology and medical oncology. Among his many professional affiliations, he is a member of the American Society of Hematology, American Society of Clinical Oncology and the New York State Society of Medical Oncologists and Hematologists. He is a Fellow of the American College of Physicians and the International Academy of Clinical and Applied Thrombosis/Hemostasis. Dr. Allen has worked on many research projects and published numerous reports, book chapters, reviews and abstracts. He is actively involved in correlative and translational research and has been the Principal Investigator for several phase I and II drug trials.


Board certifications:

  • Hematology - American Board of IM/Hematology
  • Internal Medicine - American Board of Internal Medicine
  • Medical Oncology - American Board of IM/Medical Oncology

Administrative titles

  • Assistant Chief of Medicine - Hematology Oncology, North Shore University Hospital

Academic titles

  • Professor, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell

Medical school

  • Johns Hopkins University School of Medicine


  • New York Hospital Weill Cornell Medical Center


  • New York Hospital Weill Cornell Medical Center


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Locations & insurance

The Monter Cancer Center

  • 450 Lakeville Road
    Lake Success, NY 11042

    Fax: (516) 734-8863

NSUH-Dept of Med/Hematology/Oncology

  • 300 Community Drive
    Manhasset, NY 11030

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Patient ratings & comments

Northwell Health Physician Partners is improving the patient experience by displaying physician ratings and reviews. Learn more.

Friendliness/courtesy of the care provider


Explanations the care provider gave you about your problem or condition


Concern the care provider showed for your questions or worries


Care provider’s efforts to include you in decisions about your treatment


Information the care provider gave you about medications (if any)


Instructions the care provider gave you about follow-up care (if any)


Degrees to which care provider talked with you using words you could understand


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Your confidence in this care provider


Likelihood of your recommending this care provider to others


Most recent comments:

Patient comments are gathered from the Press Ganey Patient Satisfaction Survey. Comments are displayed in their entirety and are anonymous for patient privacy.

"Dr. Allen is a phenomenal doctor and should be commended on his care, his compassion, his knowledge & even his patience with the amount of questions asked!"

"I've known Dr. Allen for 25 ys. He is an excellent doctor & has taken care of me with 3 different illnesses. Dr. Allen is a kind, caring man."

"hopefully no one else I know would need his type of services, but there is no one else I would refer them to."

"I have complete confidence in Dr. Allen!"

"Dr. Allen gives me what I need to care for my illness."

"Dr. Allen is a knowledgeable, caring and outstanding doctor."

"Dr. Allen has been treating me for 15 years. He saved my life using aggressive treatment. He has my gratitude forever."

"Dr. Allen is an unbelievable person. He cares for his patients and explains all their history."

"i have known DR Allen for years This man saved my life I have total confidence in his decision making"

"I feel very confident that Dr. Allen is providing the best care for me- he explains options & listens to my concerns- I highly recommend him."

"Dr. allen was amazing!"

"Dr Allen and NP Emily Hickson, RN Gail are all extremely knowledgeable, Very Warm and considerate. They take the time needed to explain everything to me and my daughter."

"Treated by all very good and better."

"Could not be more caring, high degree of respect and service."

"Very good & knowledgeable."

"Dr Steven Allen is a great Doctor."

"Excellent physician."

"As a healthcare provider, the explanations are often unnecessary and my level of understanding is respected and assessed well by Dr. Allen."

"Again I was well informed follow up care if needed was taken care of. Provider went over all issues."

"I had the best experience. 5. No medication."

"Excellent experience."

"Could not be better. Dr. Allen is the best."


"Dr. Allen is the best doctor I know. Professionalism, concern, knowledge, empathy, perseverance he is a 10 in all these qualities. My doctor for 25 years."

"All the above the best care one can have."

"Dr. Allen the best!!!!!"

"Dr. Allan and the staff exemplifies the service excellence quality Northwell Health stands by. The entire atmosphere at Monter was pleasant and professional. I would definitely recommend Dr. Allan to friends and family."

"Dr. Allen saved my life."

"I feel confident that I am getting the very best care for my condition with Dr Allen."

"#9. Total confidence."

"Dr. Allen & the staff at the Monter Cancer Center are the best by far. They are caring considerate thoughtful & they make the patient feel like family."

"Dr. Allen saved my life. I hold him in high esteem."

"Again I cannot thank everyone for the kindness and care I receive."

"A pleasure experience. Can't believe 18th year & helping others."

"Excellent, intelligent, thorough and thoughtful care provider"

"Very courteous, respectful, cheerful staff. Dr. Allen is a consummate professional."

"I cannot as for a better doctor to treat my issues."