Residency Leadership

Benjamin R. Lee, MD

Professor & Chair (Interim), Urology

The George W Drach, MD Endowed Chair
Director, GU Cancer & Disease Oriented Strategic Planning Team; University of Arizona Cancer Center

Research Interests

Advancing new treatments for renal cell carcinoma
Developing new technologies and techniques for treating urologic oncology

Joel T. Funk, MD, FACS

Chief of Surgical Services, BUMC South

Director of Urology at Banner University Medical Center - South Campus
Associate Professor, Urology

Research Interests

MRI imaging and evaluation of pelvic organ prolapse
Long term outcomes from HoLEP
Prostate cancer risk
Histologic evaluation of the pathogenesis of benign prostatic hypertrophy
MR fusion biopsy in the diagnosis and decision-making of prostate cancer

Christian O. Twiss, MD, FACS

Program Director, Residency

Director, Female Urology, Pelvic Medicine, and Pelvic Reconstructive Surgery
Associate Professor, Urology

Research Interests

Incontinence and vaginal prolapse treatment
Urodynamics
Interstitial cystitis
Outcomes research in incontinence and pelvic reconstructive surgery

Matthew B. Gretzer, MD, FACS

Director, Genitourinary Reconstructive Surgery

Associate Professor, Urology

Research Interests

New therapy for male incontinence
Urethral stricture management outcomes
Genitourinary trauma management
Voiding fluid dynamics

Juan J. Chipollini, MD

Assistant Professor, Urology


Research Interests

Improving perioperative and oncologic outcomes of urology patients after surgery.
Novel therapies for advanced bladder and penile cancer patients.

David T. Tzou, MD

Assistant Professor, Urology

Roger E. Nellans, MD

Associate Professor, Urology

Ken Batai, PhD

Research Assistant Professor, Urology

Research Assistant Professor, Public Health

Deb Jur, NP-C

Nurse Practitioner - Certified

Rosa Garcia, FNP

Family Nurse Practitioner

Alison Grabowski, NP

Nurse Practitioner

Cara Whittingham, NP

Nurse Practitioner