Dr. Wilsey specializes in pediatric gastroenterology, hepatology, and nutrition in the Department of Medicine. He is the vice chair of the Division of Gastroenterology and served as chief of the medical staff from 2020-2021. In 2022, he was named Johns Hopkins All Children’s Hospital Physician of the Year in the Johns Hopkins Medicine Clinical Awards. Dr. Wilsey is an advanced therapeutic endoscopist specializing in endoscopic retrograde cholangiopancreatography (ERCP) for infants and children. He is one of a select group of gastroenterologists with this expertise internationally and across North America. At Johns Hopkins All Children’s Hospital, he has developed and implemented multiple clinical innovations related to therapeutic endoscopy. He is an associate professor of clinical pediatrics at the Johns Hopkins University School of Medicine. Additionally, he is a core faculty member of the Johns Hopkins All Children’s Pediatric Residency Training Program, where he serves as a faculty and research mentor for pediatric resident physicians. Dr. Wilsey has published more than 90 peer-reviewed research articles, review articles, case reports, consensus statements, and book chapters. He also serves as a peer reviewer for several medical journals, and is the associate editor of the Journal of Pediatric Gastroenterology and Nutrition. He has delivered numerous talks nationally and internationally in the field of advanced therapeutic endoscopy, including the management of esophageal strictures. Dr. Wilsey joined the medical staff in 2002. He is also a clinical professor of pediatrics at the University of South Florida College of Medicine and a former associate program director of the University of South Florida Pediatric Residency Training Program. He earned his medical degree from the University of Miami School of Medicine. He completed his pediatric residency at Baylor College of Medicine and Texas Children’s Hospital, followed by fellowship training in pediatric gastroenterology, hepatology, and nutrition at Baylor College of Medicine and Texas Children’s Hospital. Dr. Wilsey sees patients at the following location: Outpatient Care, St. Petersburg 601 5th Street South, St. Petersburg, FL 33701 Phone: 727-822-4300 Recent News Articles and Media Coverage Study finds possible link between long COVID and mystery hepatitis in kids, Today Show - NBC (June 17, 2022) Is COVID-19 Related to Pediatric Cases of Hepatitis? Verywell Health (June 28, 2022). Dr. Wilsey is highly rated in 33 conditions, according to our data. His top areas of expertise are Esophageal Atresia, Eosinophilic Esophagitis, Tracheoesophageal Fistula, Gastrostomy, and Endoscopy.

Dr. McClenathan is chief of the division of the pediatric gastroenterology, hepatology and nutrition at Johns Hopkins All Children’s Hospital. He earned his medical degree at Louisiana State University School of Medicine and completed his pediatric internship and residency at The Johns Hopkins Hospital and his pediatric gastroenterology and nutrition clinical and research fellowships at Harvard Medical School and Massachusetts General Hospital. Dr. Mcclenathan is highly rated in 21 conditions, according to our data. His top areas of expertise are Lactose Intolerance, Morning Sickness, Rotor Syndrome, Dubin-Johnson Syndrome, and Gastrostomy.

Dr. Law has been a long-time resident of Florida, growing up in Orlando and completing her undergraduate studies and medical school at the University of South Florida in Tampa. She trained at USF for pediatric residency and spent an additional year as chief USF pediatric resident at Johns Hopkins All Children's Hospital. She lived in New York City while completing her fellowship in pediatric gastroenterology, hepatology, and nutrition at New York Presbyterian Hospital - Columbia University. She spent her training in both clinical practice and lab research focusing on the enteric nervous system and motility issues in mice. Her career passion is caring for children with all types of general GI disorders. Dr. Law sees patients at the following location: Outpatient Care, St. Petersburg 601 5th Street South, St. Petersburg, FL 33701 Phone: 727-822-4300. Dr. Law is highly rated in 6 conditions, according to our data. Her top areas of expertise are Delayed Growth, Lactose Intolerance, Morning Sickness, and Gastroschisis.

Amber Mcclain is a Pediatric Gastroenterologist and a Pediatrics provider in Tampa, Florida. Her top areas of expertise are Esophagitis, Meckel's Diverticulum, Eosinophilic Esophagitis, Median Arcuate Ligament Syndrome (MALS), and Endoscopy. Dr. Mcclain is currently accepting new patients.

Jacqueline Larson is a Pediatric Gastroenterologist and a Gastroenterologist in Tampa, Florida. Her top area of expertise is Collagenous Colitis. Dr. Larson is currently accepting new patients.

Dr. Rivera-Nieves specializes in pediatric gastroenterology, hepatology and nutrition in the Department of Medicine. She sees patients on our main campus in St. Petersburg and at Johns Hopkins All Children’s Outpatient Care, Sarasota. She joined the medical staff in 2020. Dr. Rivera-Nieves earned her medical degree from the Universidad Autónoma de Guadalajara in Jalisco, Mexico. She completed a pre-internship medical program at New York Medical College in Valhalla, New York. She then completed a family medicine internship from Vidant Medical Center, East Carolina University/Brody School of Medicine in Greenville, North Carolina, followed by a pediatric residency in general pediatrics from Vidant Medical Center, East Carolina University/Brody School of Medicine. Dr. Rivera-Nieves also completed a pediatric gastroenterology fellowship from Orlando Health, Arnold Palmer Hospital for Children/University of Florida in Orlando, Florida. Her top areas of expertise are Lactose Intolerance, Atresia of Small Intestine, Fecal Impaction, and Small Bowel Bacterial Overgrowth.

Michelle Rook is a Pediatric Gastroenterologist and a Pediatrics provider in Tampa, Florida. Dr. Rook is currently accepting new patients.

Dr. Fonseca-Mejia specializes in pediatric gastroenterology at Johns Hopkins All Children’s. She sees patients on the hospital’s St. Petersburg, Florida, campus. She joined the hospital staff in 2025. She earned her medical degree from Universidad Central del Caribe in Bayamon, Puerto Rico. She completed a pediatrics residency at Nicklaus Children’s Hospital in Miami. She then completed a fellowship in pediatric gastroenterology at UT Southwestern Medical Center in Dallas. During her training, she completed translational research on patients with biliary atresia. Her clinical interests include all aspects of general gastroenterology with special interests in inflammatory bowel disease, eosinophilic esophagitis and liver diseases. Dr. Fonseca-Mejia speaks English and Spanish.