Faculty 

Personal Bio

Wahid Wassef, MD, MPH, FACG

Wahid Wassef, MD, MPH, FACG

Chief, Division of Gastroenterology and Hepatology, UArizona College of Medicine – Phoenix
Medical Director, Digestive Diseases and Endoscopy, Banner – University Medical Center Phoenix

Medical School: Boston University Medical Center
Gastroenterology Fellowship: Rhode Island Hospital in the Brown University School of Medicine system
Pacreatico-Biliary Fellowship: Rhode Island Hospital in the Brown University School of Medicine system

Michael R. Mills, MD

Michael R. Mills, MD, MPH

Undergraduate: University of Arizona
Graduate: Tulane University School of Public Health and Tropical Medicine
Medical School: Tulane University School of Medicine
Internal Medicine Residency: University of Colorado School of Medicine
Gastroenterology Fellowship: University of Arizona Health Sciences Center, Carl T. Hayden VA Medical Center, Banner Good Samaritan Regional Medical Center
Specialties: Capsule endoscopy, colonoscopy now, endoscopic ultrasonography (EUS), ERCP, esophageal manometery, GERD, Remicade® infusion, upper GI endoscopy (EGD)

Alberto Ramos, MD
Alberto Ramos, MD

Clinical Assistant Professor of Medicine, UA College of Medicine – Phoenix

Medical School: Ponce School of Medicine
Internal Medicine Internship: Banner – University Medical Center Phoenix
Internal Medicine Residency: Banner – University Medical Center Phoenix
Specialties: Management of cirrhosis, hepatocellular cancer, upper and lower endoscopy

Adam C. Randolph, MD
Adam C. Randolph, MD

Undergraduate: University of Illinois
Medical School: Rush Medical College
Internal Medicine Residency: Banner – University Medical Center Phoenix (Formerly Banner Good Samaritan Medical Center)
Gastroenterology Fellowship: Banner – University Medical Center Phoenix, Carl T. Hayden Phoenix VA Medical Center
Specialties: Capsule endoscopy, colonoscopy now, ERCP, Remicade® infusion, upper GI endoscopy (EGD)

Shiva K. Ratuapli, MD

Shiva K. Ratuapli, MD

Medical School: Osmania Medical College
Internal Medicine Residency: Brookdale University Hospital and Medical Center
Advanced Fellowship in Gastroenterology Motility: Mayo Clinic Rochester
Gastroenterology Fellowship: Mayo Clinic Arizona
Specialties: Barrett's Esophagus, colonoscopy now, esophageal diseases, esophageal manometery, fecal transplant, hepatology and liver disease, pH monitoring, Remicade® infusion, smart pill, therapeutic endoscopy, upper GI endoscopy (EGD)

Douglas J. Schwartz, MD
Douglas Schwartz, MD

Arizona Digestive Health/Banner – University Medical Center Phoenix

Undergraduate: University of Maryland
Medical School: University of Maryland
Internal Medicine Residency: Good Samaritan Regional Medical Center
Gastroenterology Fellowship: Good Samaritan Regional Medical Center, Maricopa Medical Center
Specialties: Capsule endoscopy, colonoscopy, ERCP, open access colonoscopy, upper GI endoscopy (EGD)

Richard P. Shaughnessy IV, DO

Richard P. Shaughnessy IV, DO

Undergraduate: University of Arizona
Medical School: Western University of Health Sciences
Internal Medicine Residency: Good Samaritan Regional Medical Center, Carl T. Hayden VA Medical Center
Gastroenterology Fellowship: Good Samaritan Regional Medical Center, Carl T. Hayden VA Medical Center
Specialties: Capsule endoscopy, Crohn's Disease, ERCP, open access colonoscopy, pH monitoring, ulcerative colitis, upper GI endoscopy (EGD)

Darrell D. Wadas, MD, FACG, FASGE, FACP

Darrell D. Wadas, MD, FACG, FASGE, FACP

Undergraduate: University of Colorado
Medical School: University of Colorado
Internal Medicine Residency: Good Samaritan Regional Medical Center
Gastroenterology Fellowship: Carl T. Hayden VA Medical Center
Specialties: Barrett's Esophagus, ERCP, open access colonoscopy, therapeutic endoscopy

Joseph David, MD

Joseph David, MD

Undergraduate: University of Missouri
Medical School: University of Missouri
Internal Medicine Residency: Good Samaritan Regional Medical Center
Gastroenterology Fellowship: Good Samaritan Regional Medical Center
Specialties: ERCP, open access colonoscopy, upper GI endoscopy (EGD)

Jen-Jung Pan, MD

Jen-Jung Pan, MD

Medical School:National Yang Ming University and State University of New York at Buffalo
Internal Medicine Residency: State University of New York at Buffalo
Gastroenterology Fellowship: University of Florida College of Medicine
Transplant Hepatology Fellowship: University of Florida College of Medicine
Specialties: Transplant hepatology, gastroenterology, internal medicine