Mouhib Ayas, MD
Hospital Privileges: Providence Hospital, Providence Park Hospital, St. John Hospital and Medical Center
As part of Pediatric Gastroenterology Clinic, Dr. Ayas provides treatment for GERD, constipation, celiac disease, Crohn's disease, hepatits, ulcerative colitis and failure to thrive. Dr. Ayas was recognized by his peers as one of the region's most respected gastrointestinal specialists in Hour Detroit magazine's Top Doc survey for 2008.

Hernando J. Lyons, MD
Hospital Privileges: Providence Hospital, Providence Park Hospital, St. John Hospital and Medical Center
Dr. Lyons is board certified in Pediatrics and Pediatric Gastroenterology and is the section chief of Pediatric Gastroenterology at St. John Hospital and Medical Center. He graduated from Javeriana University in Bogota, Colombia. He completed his Pediatric residency at Jackson Memorial Hospital, University of Miami School of Medicine, Miami, Florida and a fellowship in Pediatric Gastroenterology at Children?s Hospital, State University of New York in Buffalo, New York. He is a member of the American Academy of Pediatrics and the North American Society of Pediatric Gastroenterology and Nutrition. He has clinical experience with the diagnosis and treatment of gastroesophageal reflux disease, chronic diarrhea, chronic constipation, inflammatory bowel disease, recurrent abdominal pain, peptic ulcer disease, pancreatitis, malabsorption syndrome, chronic hepatitis, liver failure and intestinal polyposis syndromes. He performs esophagogastroduodenoscopy with biopsy, full colonoscopy with biopsy, flexible sigmoidoscopy with biopsy, polypectomy, liver biopsy, pH probe monitoring of the esophagus, lactose breath hydrogent test, sclerotherapy, esophageal variceal banding, esophageal manometry and rectal suction biopsy. Dr. Lyons was named one of the area's top pediatric gastrointestinal specialists by Hour Detroit magazine in its 2004, 2005, 2006, 2007 and 2008 Top Doc survey. Staff: Office manager-Dawn Parkin Nurse practitioner-Anne Marie Stepanenko Dietitian-Filomena Castriciano

Vasundhara R. Tolia, MD
Hospital Privileges: Providence Hospital, Providence Park Hospital, St. John Hospital and Medical Center
Dr. Tolia was recognized by her peers as one of the region's most respected gastrointestinal specialists in Hour Detroit magazine's Top Doc survey for 2008.