Amazing! Great doctor very knowledgable and take his time with pt’s. Hears out all your concerns and doesn’t rush you at all. I have been having an on-going issue and I can honestly say after seeing multiple GI doctors I have fnally come across a doctor that I know I will be in good hands and he is very knowledgiable. Thank you Dr. Yoon! The only GI doctor I will be seeing in the future!