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Justin S. Ahn


Aviator and backcountry skier

About me

Dr. Justin S. Ahn is a urologist who specializes in caring for patients with urinary stones and obstructions. 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.

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. Passionate about flying planes and other aircraft, 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 their near-miss or close-call medical events.

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 awards for his teaching, research and clinical aptitude, as well as the Urology Care Foundation's Research Scholar Award.

Ahn maintains currency as a FAA commercial pilot with instrument, multiengine, seaplane and Citation jet type ratings. He is also an avid skier and snowboarder and former instructor. When not in the air or on mountains, he enjoys exercising, gardening and spending time with his family. He is originally from the Los Angeles area.

  • Education

    UT Southwestern Medical School, MD, 2013

  • Residencies

    University of Washington, Urology, 2019

  • Fellowships

    UCSF, Endourology and Laparoscopy, 2021

  • Academic Title

    Assistant Professor

My goals are to educate you so we can make the right decisions together, and to provide the same quality care I would for a family member.

Where I see patients (1)

    My reviews


    Overall Experience
    175 Ratings
    About our process
    Nov 24, 2023
    Very professional and friendly
    Nov 21, 2023
    Dr. Ahn was very knowledgeable and has a good bedside manner
    Oct 29, 2023
    All in all Dr. Justin Ahn and him team is perfect.
    Sep 19, 2023
    Very thorough and professional.
    Jul 05, 2023
    Everything is fine
    Jul 05, 2023
    Very good
    Jul 01, 2023
    Dr Ahn was very attentive to my problem
    Jun 29, 2023
    The Doctor put me at ease with his friendly manner and communicated with a friendly professionalism.
    Jun 03, 2023
    Very informative. Talked the process. Answered my questions. Excellent doctor
    Jun 01, 2023
    I've already recommended this care provider to a relative.
    May 26, 2023
    Dr. Ahn was very detailed and offered excellent medical advice
    May 19, 2023
    Dr. Ahn was great!
    Apr 12, 2023
    Highly recommended
    Apr 12, 2023
    Best provider ever!
    Apr 10, 2023
    Dr. Ahn was very thorough and thoughtful and had done a lot of preparation for our visit including reviewing my past history. He explained everything in detail and answered my questions and quickly developed a plan for addressing my condition. I was very happy with the visit.
    Mar 31, 2023
    Seemed to be willing to spend whatever time necessary with me.
    Mar 29, 2023
    I was so impressed with Dr.Justin Ahn he was very thorough and explained everything also made sure for me to beable to ask questions and I was able address all my urology issues and concerns. I learned a lot during the visit and I appreciate his care. I wish all my drs were this thorough and patient.
    Feb 11, 2023
    Dr. Ahn is very nice. He explains things clearly and listens to your concerns. He is very knowledgeable. Very polite and respectful too!
    Feb 08, 2023
    Just changed providers and this has been a great experience
    Jan 18, 2023
    Dr. Ahn is thorough and explores and explains all options.
    Jan 18, 2023
    Dr. Ahn was very helpful. He took the time and helped diagnose a very tricky and subtle pain I've been dealing with for a year now and he was able to provide very good information and guidance. His plan for treatment was also through and diligent. Thank you.
    Jan 05, 2023
    Very good
    Dec 14, 2022
    Dr. Ahn is great!
    Nov 10, 2022
    Dr. Ahn and his staff provided outstanding care - I feel fortunate to be able to rely on him for my medical treatment.
    Oct 27, 2022
    No complaints
    Oct 26, 2022
    Friendly professional knowledgeable - overall a very good experience!
    Oct 21, 2022
    Extremely knowledgeable provided several new treatment options shared screen to provide visual aids for options gave me much more useful information than I had received locally. Followed up with referral to a colleague to further explore recommended options. Dr. Ahn is outstanding!
    Oct 03, 2022
    I would of appreciated more of a follow-up from the scheduling team for planning for my procedure. I'm traveling from out of the area and needed more timely help with getting pre-op tests ordered
    Sep 30, 2022
    Dr. Ahn is a very good partner with me in my health care.
    Aug 13, 2022
    Need to tell patients about the horrible messed up road work going on for miles ! And it's not clear the address before you get there. Just saying
    Aug 10, 2022
    Very good
    Aug 03, 2022
    Dr. Ahn is fantastic. He should be the prototype for all UCSF physicians.
    Jul 23, 2022
    Excellent service and treatment by Dr. Ahn.
    Decorative Caduceus

    SOUND Pivotal Trial - (Sonomotion stOne comminUtion resoNance ultrasounD)

    Proportion of subjects with a radiographic assessment of the target stone demonstrating either (i) stone free status (zero fragments) or (ii) the presence of only stone fragments small enough to pass spontaneously (≤ 4 mm).