Overview
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.
Dr. Fonseca-Mejia is board certified in American Board Of Pediatrics. Dr. Fonseca-Mejia is currently accepting new patients.
Specialties
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Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
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- HMO
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- PPO
- EPO
- HMO
- POS
- PPO
- HMO
- POS
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
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- OTHER COMMERCIAL
- EPO
- HMO
- POS
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- EPO
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- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE PART D
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- OTHER MEDICARE PART D
- EPO
- HMO
- MANAGED MEDICAID PLAN
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- EPO
- HMO
- POS
- PPO
Locations
501 6th Avenue South, St Petersburg, FL 33701
Johns Hopkins All Children's Outpatient Care, St. Petersburg
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 29 conditions, according to our data. His clinical expertise encompasses Esophageal Atresia, Eosinophilic Esophagitis, Tracheoesophageal Fistula, Gastrostomy, and Endoscopy. Dr. Wilsey is board certified in American Board Of Pediatrics. Dr. Wilsey is currently accepting new patients.
Ach Outside Services
Dr. Karjoo specializes in pediatric gastroenterology/hepatology in the Department of Medicine at Johns Hopkins All Children’s Hospital. She sees patients in St. Petersburg and Sarasota. Dr. Karjoo’s clinical interests include hepatology and medical education. She earned her medical degree from The State University of New York Upstate Medical University. Dr. Karjoo trained in pediatrics at the University of Pittsburgh Medical Center/Children’s Hospital of Pittsburgh, in Pittsburgh, Pennsylvania. She completed a gastroenterology clinical fellowship and a gastroenterology research fellowship at the Children's Hospital of Philadelphia. Dr. Karjoo is highly rated in 20 conditions, according to our data. Her clinical expertise encompasses Lactose Intolerance, Eosinophilic Esophagitis, Rotor Syndrome, Gastrostomy, and Endoscopy. Dr. Karjoo is board certified in American Board Of Obesity Medicine and American Board Of Pediatrics. Dr. Karjoo is currently accepting new patients.
Johns Hopkins All Children's Outpatient Care, St. Petersburg
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 18 conditions, according to our data. His clinical expertise encompasses Lactose Intolerance, Rotor Syndrome, Eosinophilic Esophagitis, Encopresis, and Gastrostomy. Dr. Mcclenathan is board certified in AB Pediatrics (Pediatric Gastroenterology), AB Pediatrics - Pediatrics, and American Board Of Pediatrics. Dr. Mcclenathan is currently accepting new patients.
Frequently Asked Questions about Dr. Ashley G. Fonseca-Mejia
Does Dr. Ashley G. Fonseca-Mejia accept my insurance?
Dr. Ashley G. Fonseca-Mejia accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly to verify that your specific plan is currently accepted before your visit.
Areas of Expertise
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