Justin S. Ahn, MD

Justin S. Ahn, MD

Assistant Professor of Urology


BS, 2008, Emory University, Neuroscience & Behavioral Biology
MD, 2013, University of Texas Southwestern, Medicine
Residency, 2019, University of Washington, Seattle, Urology
Fellowship, 2021, University of California, San Francisco, Endourology and Laparoscopy


Dr. Ahn earned his undergraduate degree at Emory University and his medical degree at the University of Texas Southwestern Medical School, where he was elected to the Alpha Omega Alpha Honor Medical Society. He completed a residency in urology at the University of Washington, followed by a fellowship at UCSF in endourology (endoscopic techniques for the urinary tract) and laparoscopy. During his medical training, he earned various accolades and awards for his teaching, research and clinical aptitude, as well as the Urology Care Foundation's Research Scholar Award.

Clinical Interests

Dr. Justin S. Ahn is a urologist who specializes in caring for patients with urinary stones and obstruction. He has expertise in minimally invasive surgical techniques, such as laser prostate enucleation (using lasers to remove excess tissue blocking urine flow), ultrasound-guided access for complex or large stone removal, and robotic and laparoscopic procedures for the urinary tract.

Research Interests

In his research, Ahn looks at using new technologies to treat urinary stone and prostate disease. In 2020, he studied the role of contrast-enhanced ultrasound in the operating room to reduce the need for painful ureteral stents (tubes that allow urine to drain from the kidney) after kidney stone surgery. As a rated commercial pilot, he is interested in applying aviation industry practices to patient care and medical education. He has collaborated with aviation safety experts to develop educational conference sessions in which health care providers and trainees can safely share personal clinical errors and close-call medical events.


Patient Contact

For patient appointments,
please contact the office at:

(415) 476-7877  (Phone)

Redwood Shores Specialty Care Clinic
290 Redwood Shores Parkway
Redwood City, CA 94065

Academic Contact

(415) 476-1611  (Phone)
(415) 476-8849  (Fax)

Department of Urology
Box 0738
San Francisco, CA 94143-0738