Johns Hopkins All Children's Hospital

Meet Our Genetics Team

The Genetics team at Johns Hopkins All Children's Hospital includes a board-certified clinical geneticist and board-certified genetic counselors.

Melissa Crenshaw, MD — Melissa Crenshaw, MD
Medical Genetics

Dr. Crenshaw is the medical director for the Clinical Genetics Program at Johns Hopkins All Children’s Hospital and also serves as an assistant professor with Johns Hopkins Medicine. Her research interests include congenital heart defects, chromosome abnormalities and Turner Syndrome. She has additional expertise in the genetics of congenital heart disease and connective tissue disorders. Dr. Crenshaw is board certified in pediatrics and clinical genetics.
View Melissa Crenshaw’s Bio

L. Jane Gillis, MD — L. Jane Gillis, MD
Medical Genetics

Dr. Gillis is a physician in the Genetics Program at Johns Hopkins All Children’s Hospital. She joined the medical staff in 2019. She was previously director of medical genetics and metabolism at Valley Children’s Healthcare in Madera, California. She has authored a number of peer-reviewed publications in clinical genetics and metabolism, and has been invited to give presentations nationally and internationally.
View L. Jane Gillis’s Bio

Meral Gunay-Aygun, MD — Meral Gunay-Aygun, MD
Medical Genetics

Dr. Gunay-Aygun specializes in genetic medicine and metabolic genetics at Johns Hopkins All Children’s Hospital in St. Petersburg, Florida. She joined the medical staff in 2022 after 14 years as an attending physician at The Johns Hopkins Hospital in Baltimore. Dr. Gunay-Aygun is a professor of pediatrics and genetic medicine in the Johns Hopkins University School of Medicine. She specializes in the diagnosis and treatment of children with inherited metabolic diseases.
View Meral Gunay-Aygun’s Bio

Alexander Kim, MD — Alexander Kim, MD
Medical Genetics

Dr. Kim is a physician in the Genetics Program at Johns Hopkins All Children's Hospital. He joined the hospital staff in 2021 with a clinical and research interest in inborn errors of metabolism. Dr. Kim is board certified in pediatrics, medical genetics, and medical biochemical genetics.
View Alexander Kim’s Bio

Troy Becker, M.S., CGC — Troy Becker, M.S., CGC
ABGC Certified Genetic Counselor

Jennifer Hargett, M.S., CGC — Jennifer Hargett, M.S., CGC
ABGC Certified Genetic Counselor

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