Meet Our Ƶ 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

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

Isaac Melin, MD
Urology Resident, PGY 5

Megan Paradzinsky, MD
Urology Resident. PGY 5

Emily Polley, MD
Urology Resident, PGY 5

Arya Anvar, MD
Urology Resident, PGY 4

Kwesi Asantey, MD
Urology Resident, PGY 4

Carissa Battle, MD
Urology Resident, PGY 4

Thomas Barefoot, MD
Urology Resident, PGY 3

Sarah Erpenbeck, MD
Urology Resident, PGY 3

Madelyn Flitcroft, MD
Urology Resident, PGY 3

Sarah Kodres-O'Brien, MD
Urology Resident, PGY 3

Leah Ashton, MD
Urology Resident, PGY 2

Benjamin Bonebrake, MD
Urology Resident, PGY 2

Casey Norton, MD
Urology Resident, PGY 2

Daniel Reich, MD
Urology Resident, PGY 2

Jonathan Hjelmgren, MD
Urology Resident, PGY 1

Sukhjeevan Nijhar, MD
Urology Resident, PGY 1

Isis Sweeney, MD
Urology Resident, PGY 1
