Dr. Chaim S. Abittan

About Dr. Chaim Abittan

Dr. Chaim S. Abittan is a highly regarded Gastroenterologist and Hepatologist at North Shore Gastroenterology Associates in Great Neck, New York, where he has practiced since 2001. Dual-fellowship trained in both Gastroenterology and Transplant Hepatology, Dr. Abittan is recognized throughout the New York area for his expertise in performing colonoscopies on high-risk patients — a technically demanding specialty within the field. As a hepatologist, he also provides comprehensive liver disease management and transplant-related hepatology care.

Dr. Abittan trained at the Sackler School of Medicine and completed his fellowship at Mount Sinai Medical Center, where he had the distinction of being the last fellow to train with the renowned Dr. Henry Janowitz, and co-authored research articles with Dr. Charles Lieber — a world expert in alcoholic liver disease. In 2010, he was appointed an Honorary New York City Police Surgeon.

Education & Training

Medical Degree

• Doctor of Medicine (MD) — Sackler School of Medicine, Tel Aviv University, Israel (1994)

Internship & Residency

• Internal Medicine — North Shore University Hospital at Manhasset
• Internal Medicine — Memorial Sloan Kettering Cancer Center (completed 1997)

Fellowship

• Dual Fellowship in Gastroenterology & Transplant Hepatology — Mount Sinai Medical Center (completed 2000)

Hospital Affiliations

• North Shore University Hospital, Manhasset, NY
• North Shore University Hospital at Glen Cove, NY
• Francis Heart Center, Port Washington, NY

Areas of Expertise / Conditions Treated

• Colonoscopy (including High-Risk Patients)
• Liver Disease & Hepatology
• Transplant Hepatology
• Inflammatory Bowel Disease (Crohn’s Disease, Ulcerative Colitis)
• Alcoholic Liver Disease
• Gastroesophageal Reflux Disease (GERD)
• Colon Cancer Screening & Polyp Removal
• Hepatitis B & C
• Cirrhosis Management

Why Patients Choose Dr. Abittan

1. Near-perfect 4.98/5.0 rating from 63 verified patient reviews.
2. Dual-fellowship trained in both Gastroenterology AND Transplant Hepatology — rare expertise.
3. Recognized specialist in high-risk colonoscopies throughout New York.
4. Trained under legendary GI pioneer Dr. Henry Janowitz at Mount Sinai.
5. Honorary NYC Police Surgeon — a testament to his community trust and clinical standing.

Patient Rating Snapshot

Practice Information

• Practice Name: North Shore Gastroenterology Associates
• Location: Great Neck, NY 11023
• Professional Memberships: American College of Gastroenterology; American Gastroenterological Association; American Association for Study of Liver Diseases; Crohn’s & Colitis Foundation
• Note: Medicaid bookings not facilitated through erothots — call office directly

Frequently Asked Questions

Q: What makes Dr. Abittan qualified to perform colonoscopies on high-risk patients?

Dr. Abittan’s dual fellowship in Gastroenterology and Transplant Hepatology, combined with his decades of clinical experience and research-level expertise, equip him to handle the complex anatomical and medical challenges posed by high-risk colonoscopy patients.

Q: Is Dr. Abittan also a hepatologist?

Yes. Dr. Abittan is fellowship-trained in Transplant Hepatology, making him a qualified hepatologist who manages complex liver diseases including cirrhosis, hepatitis, and post-transplant care.

Q: Is Dr. Abittan accepting Medicaid patients?

This provider does not facilitate Medicaid bookings through erothots. Patients with Medicaid plans are encouraged to contact the office directly.

Q: What professional societies is Dr. Abittan a member of?

Dr. Abittan is an active member of the American College of Gastroenterology, the American Gastroenterological Association, the American Association for the Study of Liver Diseases, and the Crohn’s and Colitis Foundation of America.

Q: What research has Dr. Abittan published?

During his fellowship at Mount Sinai, Dr. Abittan co-authored scholarly research articles with Dr. Charles Lieber, a world expert in alcoholic liver disease.