James Dennis
Sullivan, MD

Surgery, Colon/Rectal Surgery

(516) 487-9454

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About your doctor:

Member of Northwell Health Physician Partners
Languages spoken:


Specialize in robotic and laparoscopic cancer surgery. Including colon rectum stomach liver pancreas spleen


Board certifications:

  • Colon/Rectal Surgery - American Board of Colon and Rectal Surgery
  • Surgery - American Board of Surgery

Administrative titles

  • Director - Robotic Surgery of Surgery - Division of General Surgery, Long Island Jewish Medical Center
  • Vice Chairman - Surgery of Surgery - Division of General Surgery, North Shore University Hospital
  • Director - Robotic Surgery of Surgery, Southside Hospital

Academic titles

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

Medical school

  • New York Medical College


  • North Shore University Hospital


  • Cleveland Clinic Education Foundation


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Locations & insurance

North Shore-LIJ Surgical Oncology

  • 450 Lakeville Road
    Lake Success, NY 11042

    Fax: (516) 487-2745

Imbert Cancer Center

  • 440 East Main Street
    Bay Shore, NY 11706

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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


Amount of time the care provider spent with you


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.

"I highly recommend Dr. Sullivan to any one that would need surgery for cancer. He is a great doctor and makes me feel important when I visit him. He cares about his patients and is sending me for further test. God bless him and his staff. Great man to have working at North well."

"Great surgeon!!"

"Dr. Sullivan was able to get me thru a very difficult procedure. I knew when I met him he was the right dr. because of his knowledge, confidence, & bedside manner. His follow up visits are just as good."

"I have great confidence with Dr. Sullivan. Highly recommended."

"Absolutely love Dr. Sullivan. Very very good and informative on decisions. I do recommend him to others. Great person!!"

"I have total confidence in Dr. Sullivan."

"He was terrible."

"Always a "good" experience. 1. Dr. James Sullivan"

"Put myself at complete ease. Had less worries about my surgery."

"I'm very happy"

"Best description of visit: He works very fast (the word "Gallop" comes to mind) and decisively."

"I had a very pleasant experience"

"Dr. Sullivan called the GE doing the endoscopy - personally while we were in office - Felt such authority - I was going to be OK with this Dr. -"

"Very courteous and professional. Seeing Dr. Sullivan each morning was extremely reassuring. Same for Dr. V. Moon. Each morning seeing them kept me assured that I was well taken care of."

"very good"

"Dr. Sullivan is a great doctor very caring."

"It was a memorable experience."

"Dr. Sullivan is a compassionate and caring physician"

"Dr. Sullivan was very good he explained things to us."

"I can't say enough about this whole group, they were all great. Great sense of humor."

"I really appreciate Dr. Sullivan's warmth and caring. I did not in any way feel like I was in a cold, bureaucratic medical office. It felt like my family was waiting to take care of me."

"does not answer questions or concerns other than joking or dismissing them, like about procedure or pain management."

"I trust Dr. Sullivan, He is one of the best Doctors I have met ... And In the last year I have met a lot."

"Not enough time spent with dr. felt a bit ignored and rushed."

"This is a yearly routine exam. There were no issues to discuss."

"Dr. Sullivan is just great - Easy to talk to - Explains everything very well."

"I found Dr. Sullivan very caring & down to earth he made me feel my problem was serious but everything would work out good & it did."

"MD special and very much appreciated."

"Dr. Sullivan is absolutely the best. I have 100% trust & confidence in him. Felt very comfortable in his care."

"Never had a bad experience."

"Confidence keyword with Dr. Sullivan. He's thorough associated with him for years."


"Very good experience."

"We have very good experience."

"Very good experience."

"Dr. Sullivan is a wonderful doctor."

"Never have any complains."

"Pleased very."

"I'm pleased with the time, attention and service received."

"Dr. Sullivan made me feel like an old friend & I have complete confidence in him."

"Dr. Sullivan is warm and sincere and make me very comfortable in an uncomfortable situation. I could not ask for more."

"Sullivan is a very good and understanding care provider."

"There aren't words in the English language to describe Dr. Sullivan's concern, care & compassion!!"

"Dr. Sullivan is absolutely the best - I trust him as I did w/my life. Great guy."

"Dr. Sullivan was simply the "Best." Good dr. Good person - highly recommended."

"Would always recommend."