Jeffrey s. Novak, MD, FACG Zachary R. Marwil, MD

Diplomates in Gastroenterology

We have extensive experience in treating a wide spectrum of gastrointestinal related health issues.

Our services include:

GI Consultation

Acid Reflux/Heartburn/GERD

Blood in Stool

Colon Cancer Screening

Crohn’s Disease & Ulcerative Colitis

Change in Bowel Habits

Liver Disease



All elective procedures are performed at the Endoscopy Center of Long Island (ECLI) in Garden City, NY. ECLI is a state of the art ambulatory endoscopy center dedicated to early detection, diagnosis, treatment, and prevention of cancer and gastrointestinal diseases of the esophagus, stomach, small intestine, and colon.