Meet Our Ϲ Department of Urology Team
Adult Faculty and Staff







Peter N. Dietrich, MD
Assistant Professor
Infertility, Vasectomy







Arjun Sivaraman, MD
Associate Professor
Urologic Oncology


Tyler Wittmann, MD
Assistant Professor
General Urology




Myranda J. Koch, BSN, RN, DNP, FNP-BC, APNP
APP Hybrid
General Urology



Christos Reppas, PA-C, NCCPA
Physician Assistant
General Urology



Pediatric Faculty and Staff

Douglas W. Storm, MD
Pediatric Chief, Professor

Jonathan S. Ellison, MD
Research Vice-Chair, Associate Professor

Travis Groth, MD
Associate Professor

John V. Kryger, MD
Professor

Elizabeth B. Roth, MD
Associate Professor

Matthew James Armstrong, APNP
Nurse Practitioner

Katherine Ellen Kressin, APNP
Nurse Practitioner

Coleen Rosen, APNP
Nurse Practitioner

Heidi Vanderpool, APNP
Nurse Practitioner
Emeritus Faculty

Robert Donnell, MD
Emeritus

Hrair-George Mesrobian, MD
Emeritus

Michael Mitchell, MD
Emeritus

William See, MD
Emeritus
Urology Residents

Nayan Shah, MD
Urology Resident

Brendan Waldoch, MD, MS
Urology Resident

Andrew Watts, MD
Urology Resident

Isaac Melin, MD
Urology Resident

Megan Paradzinsky, MD
Urology Resident
