We will continue to keep our patients, staff and community safe during this pandemic.

To schedule either a live or televisit appointment, please call 908-688-6565.

Geethan Sivananthan, MD – Union - West &Millburn - West Orange

Licensure: New Jersey, New York

Board-Certified: American Board of Internal Medicine, American Board of Gastroenterology

Fellowship Training: Gastroenterology, Lenox Hill Hospital, New York, NY

Residency Training: Internal Medicine, Weill Cornell New York Presbyterian Hospital, New York, NY

Member: American Gastroenterology Association, American College of Gastroenterology, American Society for Gastrointestinal Endoscopy, American Medical Association

Affiliated Hospitals: Overlook Hospital, Summit

Dr. Geethan Sivananthan (Siva) is board-certified in internal medicine and gastroenterology. He graduated summa cum laude from the honors program at Rutgers College. He earned his medical degree from Rutgers-New Jersey Medical School, where he was elected to the exclusive Alpha Omega Alpha Honor Society, a lifelong recognition of a physician’s excellence and dedication to the medical profession and the art of healing. Dr. Sivananthan completed his internal medicine internship and residency at the prestigious Weill Cornell-New York Presbyterian Hospital in Manhattan. He went on to complete his fellowship in gastroenterology at Lenox Hill Hospital, training under a world-renowned physician team, where he gained valuable clinical and patient experience. Dr. Sivananthan previously served as director of gastroenterology services at the Christ Hospital charity clinic while he was a gastroenterology attending physician with CarePoint Medical Group.

Dr. Sivananthan has presented original research in the GI field at several national conferences, including the American College of Gastroenterology annual scientific congress. His clinical interests encompass the full breadth of gastrointestinal disease and endoscopy with particular interests in colon cancer screening and awareness, acid reflux disease, celiac disease, Barrett’s esophagus, capsule endoscopy and inflammatory bowel disease.

Born and raised in New Jersey, Dr. Sivananthan is pleased to be back in the area providing excellent patient care at Center for Digestive Diseases. When he is not practicing medicine, he enjoys spending time with his wife and young son, enjoying all that the area has to offer.

Office Locations

Main Office

695 Chestnut Street
Union, NJ 07083
Call: 908-688-6565
Fax: 908-688-3161

Click for directions

Onsite Ambulatory Surgery Location


1201 Morris Avenue, Union, NJ 07083
Click for directions |

Affiliated Hospitals

Medical Center

99 Beauvoir Avenue
Summit, NJ 07901

Newark Beth Israel
Medical Center

201 Lyons Avenue
Newark, NJ 07112

Trinitas Regional
Medical Center

225 Williamson Street
Elizabeth, NJ 07207