Meet Our Urologists

Natalia Ballesteros, MD

Natalia Ballesteros, MD

Urology
Dr. Ballesteros specializes in pediatric urology in the Johns Hopkins All Children’s Hospital Department of Surgery. She earned her medical degree from Meharry Medical College in Nashville, Tennessee. She completed an internship in general surgery and a residency in urology from the University of Louisville. Dr. Ballesteros then completed a pediatric urology fellowship from Nicklaus Children’s Hospital in Miami. She also has a certification of fellowship in da Vinci® Surgery in pediatric urology.
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Sisir Botta, MD

Sisir Botta, MD

Urology
Dr. Botta specializes in pediatric urology in the Johns Hopkins All Children’s Hospital Department of Surgery. He earned his medical degree from the University of Tennessee College of Medicine. Dr. Botta trained at Medical College of Georgia and completed a fellowship in urology at the University of California, San Francisco.
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Katherine Corbyons, MD

Katherine Corbyons, MD

Urology
Dr. Corbyons specializes in pediatric urology in the Johns Hopkins All Children’s Hospital Department of Surgey. She earned her medical degree from the University of Florida College of Medicine, where she also completed her internship and residency. Dr. Corbyons then completed a fellowship at Cincinnati Children’s Hospital Medical Center.
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Ethan Polsky, MD

Ethan Polsky, MD

Urology
Dr. Polsky specializes in pediatric urology in the Johns Hopkins All Children’s Hospital Department of Surgery. He earned his medical degree from the University of Kentucky College of Medicine, where he also completed his internship and residency. Dr. Polsky then completed a fellowship in pediatric urology at Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center. Additionally, Dr. Polsky is a clinical associate professor of urology and pediatrics for the University of South Florida.
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