Bon Chang "Andy" Koo, M.D.

4.9 out of 5 
Office Locations:


466 Old Hook Road, Suite 1
Emerson, NJ 07630
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269 Livingston Street, Suite L
Northvale, NJ 07647
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1 W. Ridgewood Ave, Suite 301
Paramus, NJ 07652
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Dr. Koo completed both his M.D. and Internal Medicine residency at the NYU School of Medicine and completed his Gastroenterology training at Mt. Sinai Hospital. Dr. Koo was also a post-doctoral fellow in the study of various liver diseases at the University of Washington. He treats all aspects of gastrointestinal conditions and has special interests in the management of inflammatory bowel disease and therapeutic endoscopy. Dr. Koo is also trained in biliary endoscopy, capsule endoscopy, and endosonography.

Dr. Koo is board certified by the American Board of Internal Medicine in Gastroenterology.

Featured Reviews



Dr. Koo is very thorough. He asks a lot of questions to make sure he understands your health issue and is willing to work with you to satisfy your needs. I would highly recommend Dr. Koo to anybody in need of a gastroenterologist.

   — Carol Kunzig


They got 5 stars for doing their job. I was pre-screened by 3 minute phone call at home the day before. I was taken on time. My doctor remembered my case, answered all of my questions and the scheduling of the next appointment went very efficiently. This is what I want and don't always get.

   — William Daub


I have been seeing Dr. Koo for several years now as my gastroenterologist. He is always patient, thorough and extremely knowledgeable. I trust his guidance and we always come up with a logical and effective game plan regarding any of my health issues!

   — RK


I have consistent great experiences w Dr Koo. He has taken care of my routine needs (colonoscopies etc) - and more recently helped w an acute problem. Always very caring and provides fantastic care

   — Miller


Informative, thorough, proactive. Excellent overall. Highly recommended.

   — Tetsu Funabashi


Dr. Koo is kind, patient, understanding and phenomenal in his profession. His staff are wonderful and there is rarely a time that you have to wait!! I would recommend Dr. Koo to everyone I know!!

   — Kim Iacovino

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