Onpan Cheung is a Gastroenterologist in Denison, Texas. Dr. Cheung is highly rated in 1 condition, according to our data. Her top areas of expertise are Nonalcoholic Steatohepatitis (NASH), Esophageal Varices, Diverticular Disease, Endoscopy, and Gastrectomy. Dr. Cheung is currently accepting new patients.