David D. Douglas, M.D.

David D. Douglas, M.D., is a gastroenterologist and transplant hepatologist at Mayo Clinic in Phoenix, Arizona. He specializes in the diagnosis and treatment of complex liver disease, with particular expertise in chronic viral hepatitis, liver transplantation and the prevention and treatment of hepatitis B and hepatitis C recurrence after liver transplant.

Dr. Douglas cares for patients with hepatitis B, hepatitis C, other forms of viral hepatitis, cirrhosis, metabolic dysfunction-associated steatotic liver disease (MASLD), alcoholic hepatitis, hepatic encephalopathy and other acute and chronic liver conditions. He evaluates patients for liver transplantation and helps manage complications of advanced liver disease.

As a member of Mayo Clinic's Liver Transplant Program and Hepatobiliary Clinic, Dr. Douglas collaborates with specialists across disciplines to provide individualized, evidence-based care. His clinical interests include therapies for chronic viral hepatitis and strategies to treat and prevent post-transplant recurrence of hepatitis B and hepatitis C.

Dr. Douglas is board-certified in gastroenterology and transplant hepatology by the American Board of Internal Medicine. He completed residency training in gastroenterology and fellowship training in gastroenterology and hepatology at Mayo Clinic in Rochester, Minnesota.

In addition to his clinical practice, Dr. Douglas contributes to research and professional activities related to viral hepatitis and transplantation. His patient-care approach emphasizes coordinated specialty care, clear communication and treatment plans tailored to each patient's diagnosis and transplant needs.