Meet Our 91ɫƵ 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

John V. Kryger, MD
Pediatric Chief, Professor

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

Travis Groth, MD
Associate Professor

Elizabeth B. Roth, MD
Associate Professor

Matthew James Armstrong, APNP
APP Outpatient

Katherine Ellen Kressin, APNP
APP Outpatient

Coleen Rosen, APNP
APP Outpatient

Douglas W. Storm, MD
Chief, Professor

Heidi Vanderpool, APNP
APP Outpatient
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

Emily Polley, MD
Urology Resident

Arya Anvar, MD
Urology Resident

Kwesi Asantey, MD
Urology Resident

Carissa Battle, MD
Urology Resident

Thomas Barefoot, MD
Urology Resident

Sarah Erpenbeck, MD
Urology Resident

Madelyn Flitcroft, MD
Urology Resident

Sarah Kodres-O'Brien, MD
Urology Resident

Leah Ashton, MD
Urology Resident

Benjamin Bonebrake, MD
Urology Resident

Casey Norton, MD
Urology Resident
