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If you have a medical emergency call 911 or go to the nearest Emergency Department. Call 631-689-2600 if you need to speak with Dr. Leiboff urgently. To schedule an appointment or for other office matters, please call 631-689-2600 during regular office hours.

Dr. Leiboff is often available to discuss colorectal conditions. Call or text 631-320-8552 or tap the red button to...



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“I just wanted to inform you of how appreciative I am with your services. Dr. Leiboff has the most wonderful bedside manner. He listens to his patient, without rushing me out of his office. Dr. Leiboff actually displays sincere kindness, concern, and compassion. This world would be a better place if others followed in his footsteps.” DGN 2/21/17

“Thank you Dr. Leiboff & that wonderful staff of yours. Its already 5 years since my cancer & everything is great. I will always keep all of you in my heart.” SS

“I have been a patient of Dr. Leiboff’s for over fifteen years. The first time I saw him I was 21 years old, and as you can imagine as a young girl, I was mortified to have to have such an ’embarrassing’ examination. Dr. Leiboff was very comforting and professional which instantaneously put my nerves at ease, and he was able to diagnose and manage my condition almost immediately. Dr. Leiboff’s staff is amazing and will always go the extra step to help get the answers you are looking for as they always make the patient feel like an individual in this small private practice. There is a lot to be said about going to a physician who can focus on each patient without the politics of these larger healthcare conglomerates dictating how they must do their job. Working in the industry, I would never see a physician without extensive consideration and research. I can personally and professionally endorse Dr. Leiboff’s credentials and reputation and hands down he is one of the best colon and rectal surgeons in the area.” JJ