David T. Tzou, MD

Assistant Professor, Urology
Academic Professional Bio: 

David Tzou, MD, is a Tucson native and earned his medical degree at the University of Arizona College of Medicine - Tucson. He also completed his internship in general surgery and residency in urologic surgery at the University of Arizona. During his residency, Dr. Tzou won numerous patient care awards, including the George W. Drach Award for exemplifying compassion in the care of urologic patients. He stayed on at the UA as an assistant professor before moving to become an assistant adjunct professor at the University of California – San Francisco (UCSF). He recently completed a 2-year endourology and laparoscopy fellowship at UCSF.

“Dr. Tzou will help develop a new multi-disciplinary Stone Clinic, in collaboration with Urology, Nephrology, and Nutrition, to help patients who are recurrent stone formers determine metabolic causes to prevent stones from returning," said Dr. Benjamin Lee, Urology Division chief. "Dr. Tzou has a clinical interest in ultrasound guided percutaneous access for patients with large staghorn calculi and brings this expertise to the University of Arizona and BUMC-T.”

Dr. Tzou is a board-certified urologist specializing in the treatment of urinary stone disease and benign prostatic hyperplasia (BPH). He is an active member of the American Urological Association (AUA), the Western Section of the AUA (WSAUA), and the Endourological Society.

Dr. Tzou's research interests focus on improving clinical outcomes for patients with kidney stones and BPH, utilizing ultrasound to treat complex kidney stones, and improving communication between patients and physicians.

  1. MD: University of Arizona College of Medicine - Tucson, 2008
  • University of Arizona, General Surgery, 2008-2009
  • University of Arizona, Urology Division, 2009-2013
  • University of California San Francisco, Endourology and Laparoscopy (2-year, Endourological Society), 2016-2018
Board Certifications:
  • American Board of Urology, 2015



Tzou, D. T., T. O. Tailly, and K. L. Stern, "Ultrasound-Guided PCNL - Why Are We Still Performing Exclusively Fluoroscopic Access?", Curr Urol Rep, 2023 May 06. PMCID: 9569289 


Tzou, D. T., K. L. Stern, B. D. Duty, R. S. Hsi, N. E. Canvasser, S. De, A. C. Wong, C. R. Royal, M. L. Sloss, J. B. Ziemba, et al., "Heterogeneity in stone culture protocols and endourologist practice patterns: a multi-institutional survey.", Urolithiasis, vol. 51, issue 1, pp. 15, 2022 Dec 12.
Raskolnikov, D., D. T. Tzou, J. S. Ahn, S. K. Bechis, T. L. Chi, M. D. Sorensen, M. L. Stoller, and J. D. Harper, "Multi-Institutional Variation in Performance of Low-Dose Computed Tomography for the Evaluation of Suspected Nephrolithiasis.", J Endourol, vol. 36, issue 10, pp. 1377-1381, 2022 Oct.


Bergersen, A. M., I. Khan, A. C. Wong, J. J. Chipollini, B. D. Weiss, and D. T. Tzou, "Online Kidney Stone Educational Materials Do Not Meet Recommended Readability Standards.", Urol Pract, vol. 8, issue 2, pp. 246-252, 2021 Mar.


Lwin, A. A., J. Zeng, P. Evans, M. C. Phung, K. A. Hynes, E. T. Price, C. O. Twiss, D. T. Tzou, and J. T. Funk, "Holmium Laser Enucleation of the Prostate Is Safe and Feasible as a Same Day Surgery.", Urology, vol. 138, pp. 119-124, 2020 Apr.
Tzou, D. T., I. S. Metzler, C. Tsai, J. Goodman, D. B. Bayne, and T. Chi, "Ultrasound-guided Morcellation During Difficult Holmium Laser Enucleation of the Prostate.", Urology, vol. 135, pp. 171-172, 2020 Jan. PMID: 31589882
Beiko, D., H. Razvi, N. Bhojani, J. Bjazevic, D. B. Bayne, D. T. Tzou, M. L. Stoller, and T. Chi, "Techniques - Ultrasound-guided percutaneous nephrolithotomy: How we do it.", Can Urol Assoc J, vol. 14, issue 3, pp. E104-E110, 2020 Mar. PMCID: PMC7053366 
Armas-Phan, M., D. T. Tzou, D. B. Bayne, S. V. Wiener, M. L. Stoller, and T. Chi, "Ultrasound guidance can be used safely for renal tract dilatation during percutaneous nephrolithotomy.", BJU Int, vol. 125, issue 2, pp. 284-291, 2020 Feb. PMID: 30811835


Tzou, D. T., I. S. Metzler, M. Usawachintachit, M. L. Stoller, and T. Chi, "Ultrasound-guided Access and Dilation for Percutaneous Nephrolithotomy in the Supine Position: A Step-by-Step Approach.", Urology, vol. 133, pp. 245-246, 2019 Nov. PMID: 31376473


Lwin, A., D. Tzou, and J. Funk, "Response to Stutz et al. re: "Management of Suspected Bladder Injury and Capsular Perforation After Holmium Laser Enucleation of the Prostate".", J Endourol Case Rep, vol. 4, issue 1, pp. 205, 2018. PMCID: PMC6302907 


Michalak, J., D. Tzou, and J. Funk, "HoLEP: the gold standard for the surgical management of BPH in the 21(st) Century.", Am J Clin Exp Urol, vol. 3, issue 1, pp. 36-42, 2015. PMCID: PMC4446381