Dr. Tan is a board certified specialist in diseases of the liver, pancreas, gallbladder and digestive tract. He treats diseases such as dyspepsia, diarrhea, constipation, gastrointestinal bleeding, diverticular disease, hemorrhoids, gastroesophageal reflux, acid-related disorders, fatty liver, jaundice, hepatitis, cirrhosis, gallstone related disorders and cancers of the liver and gastrointestinal tract. He also performs diagnostic and therapeutic endoscopic procedures (esophagogastroduodenoscopy, sigmoidoscopy, colonoscopy, etc). He also specializes in Internal Medicine, manages systemic diseases such as hypertension, diabetes, dyslipidemia, uncomplicated respiratory/urinary infections, COVID infection and other adult diseases in general.