Ashley Giselle Fonseca-Mejia, MD
Pediatric Gastroenterology
Highlights
Age Groups Seen
- Infant 0-2
- Child 3-12
- Adolescent 13-17
Languages
- Spanish
- English
In-Network Plans
View All Accepted Plans (23)Gender
FemaleJohns Hopkins Affiliations:
- All Children's Specialty Physicians
About
Johns Hopkins Physician
Background
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.
Centers and Institutes
Locations
- Johns Hopkins All Children's Outpatient Care, St. Petersburg
- 601 5th Street South, Suite 620, Saint Petersburg, FL 33701
- Get Directions
- Phone: 727-822-4300
- Fax: 727-456-1399
- Johns Hopkins All Children's Outpatient Care, St. Petersburg
- 601 5th Street South, Suite C230, Saint Petersburg, FL 33701
- Get Directions
- Phone: 727-767-2818
- Fax: 727-767-4391
Expertise
Education
- Fellowship: UT Southwestern Medical Center, Pediatric Gastroenterology, 2025
- Residency: Nicklaus Children's Hospital, Pediatrics, 2022
- Medical Education: Universidad Central del Caribe School of Medicine, MD, 2019
Board Certifications
- Pediatric Gastroenterology: American Board of Pediatrics
- Pediatrics: American Board of Pediatrics, 2023
Insurance
- Aetna (Commercial)
- Aetna Better Health (Medicaid)
- Avmed (Commercial)
- Baycare - Cigna OB/GYN, GI only
- BCBS FL (Commercial)
- CareSource (Medicaid)
- Cigna Health Care (Commercial)
- Community Care Plan (Medicaid)
- Curative
- Evolutions (Commercial)
- Florida Community Care
- Florida Medicaid
- Gulf Coast Provider Network (Commercial)
- Humana Medicaid
- Medicare
- Molina/ Magellan (Medicaid)
- Multiplan (Commercial)
- Simply Healthcare (Medicaid&Healthy Kids)
- Sunshine State/ Wellcare (Medicaid &Healthy Kids)
- TriCare
- United (Commercial)
- United Community Plan (Medicaid&HealthyKids)
- WPS TriCare East (Commercial)
Reviews
4.7 of 5 stars
32 Ratings, 1 ReviewThe Patient Rating is an average of patient responses to care provider questions on the Press Ganey Medical Practice Survey. Responses are measured on a 5-star scale, with 5 stars representing the highest rating. Patient comments are also collected through the Press Ganey Medical Practice Survey and are displayed in their entirety. To protect patient privacy and confidentiality, all comments are de-identified before publication.
- 5 out of 5 starsReviewed on 9/17/2026
Dr. Fonseca-Mejia is great. I truly appreciate her taking the time to explain everything and answer all questions. She is doing great so far with helping me with my son's GI issues.
- 5 out of 5 starsReviewed on 7/7/2026
We felt like the doctor was compassionate and thorough.