excellent physicianhave been seeing him for many years

   — Lauren

Dr. Koo always take his time in our appointments and clearly explains in detail what he feels is the best course of action for whatever the issue is at hand. He is friendly, extremely knowledgeable and patient and I would highly recommend!

   — Robin Katz

Even though this was my first visit with Dr. koo, he understood my need very quickly & kindly solved the solution. I was very happy to received his kind service.

   — Hiromi Kagitani

have been seeing dr koo for many years. outstanding and caring physician. I routinely recommend him to all my friends who need a GI doctor

   — May

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