Even in this time of uncertainty, Mayo Clinic is a place for hope and healing — and we're delivering the care you need. Mayo Clinic follows carefully designed, rigorously enforced safety precautions for anyone who needs face-to-face care. We're safely treating all patients, both in person and through virtual visits, in adherence with federal and state executive orders and guidance. David D. Douglas, M.D., is a gastroenterologist (transplant hepatologist) with the Liver Transplant Program and Chair of the Transplant Center at Mayo Clinic in Phoenix, AZ where he directs all solid-organ transplant activities. His primary clinical interests include therapies for chronic viral hepatitis, hepatitis B, hepatitis C and hepatitis infectious disease. Specifically treatment and prevention of post transplantation recurrence of hepatitis B and C.