Faculty 

Personal Bio

Wahid Wassef, MD, MPH, FACG

Wahid Wassef, MD, MPH, FACG

Chief, Division of Gastroenterology and Hepatology, U of A 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)

Nisha Sharma, MD
Nisha Sharma, MD

Medical School: Grant Medical College, Mumbai, India
Internal Medicine Residency: Westchester Medical Center/ New York Medical College, Valhalla, New York​​​​​​​
Gastroenterology Fellowship: Beaumont Hospital, Royal Oak, Michigan​​​​​​​
Specialties: Gastroenterology including general GI, IBD and interventional endoscopy

Sakolwan Suchartlikitwong, MD

Sakolwan Suchartlikitwong, MD

Medical School: Chulalongkorn University, Bangkok, Thailand
Internal Medicine Residency: Texas Tech University Health Sciences Center, Lubbock, Texas
Gastroenterology Fellowship: University of Arizona College of Medicine, Phoenix, Arizona
Specialties: General gastroenterology, swallowing and reflux diseases, foregut motility

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

Kevin Liu

Kevin Liu, MD

 

Medical School: Northwestern University, Feinberg School of Medicine
Internal Medicine Residency: Northwestern University, Feinberg School of Medicine
Gastroenterology Fellowship: Northwestern University, Feinberg School of Medicine
Advanced Endoscopy Fellowship: Northwestern University, Feinberg School of Medicine