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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.

  • Board Certifications

    American Board of Urology, Urology, 2024

  • Fellowships

    UCSF, Urology, 2021

  • Residencies

    University of Washington School of Medicine, Urology, 2019

  • Internship

    University of Washington School of Medicine, General Surgery, 2014

  • Degree

    University of Texas Southwestern Medical Center at Dallas Southwestern Medical School, 2013

  • Languages

    English

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 (3)

    My reviews

    4.9

    Overall Experience
    302 Ratings
    About our process
    Jun 09, 2025
    Very patient and thorough, even though I was a physician, he explained things/ options
    Jun 05, 2025
    Excellent and thoughtful care
    May 16, 2025
    All good and I have recommended Dr. Ahn to a family member who also was pleased with Dr. Ahn! I very much appreciated Dr. Ahn's examining me for a condition not directly related to the surgical procedure he performed and Dr. Ahn's lightning quick pulling up of pictorial descriptions of the condition and possible treatment options and supportive medical devices.
    May 08, 2025
    Dr. Ahn was amazing. He studied my history, knew my test results and carefully analyzed all parts of my medical issues. He took time to explain the issues and gave me 2 options. When asked for his opinion of the best option, he answered with pros and cons. He was incredibly thorough and knowledgeable.
    Apr 04, 2025
    Dr Anh was kind and straightforward with me and helped me understand my choices for further testing and treatment. Excellent doctor!
    Mar 23, 2025
    The office was great and Dr Ahn is very patient and explains things well. Did not feel at all rushed which made for a very comforting experience.
    Mar 10, 2025
    Dr. Ahn was very respectful and informed me greatly regarding my condition as well as the treatment that was decided upon. I would definitely refer friends and family to him.
    Mar 10, 2025
    Excellent
    Mar 06, 2025
    Dr. AHN is VIP# 1
    Feb 08, 2025
    Outstanding !!!
    Jan 22, 2025
    Dr Ahn is the best. He explained and scanned and diagramed to gives us a clear picture of the previous and upcoming procedure to be performed. UCSF cares so much. We are thankful to all.
    Nov 21, 2024
    So impressed that referred prospective patient
    Oct 22, 2024
    Good
    Oct 19, 2024
    Doctor and all staff handled this visit and previous ones with excellent care
    Oct 17, 2024
    I was very impressed by Dr. Ahn's responsiveness and thoroughness in suggesting treatment options.
    Oct 16, 2024
    The MD was "REALLY "" FANTASTIC
    Oct 10, 2024
    I'm very pleased with the care Dr Ahn provided
    Oct 08, 2024
    Excellent service by the doctor and his staff
    Oct 04, 2024
    I was quite comfortable both speaking with Dr. Ahn during our video appointment as well as the interactions I had with two different individuals. Unfortunately, I only recall the name of one, Wendy (I'm SO sorry!).
    Sep 23, 2024
    Had to wait for over an hour after appointment time for the Dr. To join the video visit.
    Sep 11, 2024
    Exemplary!
    Aug 21, 2024
    Dr. Ahn was extremely thorough and thoughtful during our visit. He explained everything in detail, answered all my questions, and swiftly developed a plan to address my condition. He appeared willing to spend as much time as needed with me, providing clear explanations and attentively listening to my concerns. Dr. Ahn is highly knowledgeable, polite, and respectful.I left the appointment very satisfied.
    Aug 20, 2024
    Happy & satisfied
    Aug 14, 2024
    Couldnt' have been better
    Aug 10, 2024
    I am out of state and prefer Dr Ahn to any local provider I have visited that takes my insurance.
    Aug 09, 2024
    I have already recommended Dr Ahn to a friend
    Jul 19, 2024
    Honestlly, I'd give most of these a 6 if I could. Dr. Anh is extremely clear and detailed.
    Jul 13, 2024
    100% EXCELLENT
    Jul 09, 2024
    UCSF great service, very professional, makes you feel like you're in good hands (to quote an old AllState insurance ad)
    Jun 08, 2024
    I had an excellent experience with Dr. Ahn for all of the above reasons.
    May 11, 2024
    Great listener and clear and thorough explanation of risks, benefits and alternatives of treatment.
    May 11, 2024
    Best experience ever! Dr. Ahn is remarkably skilled as both a surgeon and with bedside manner.
    May 06, 2024
    Was promised follow-up phone call and video visit. Neither have happened
    Apr 17, 2024
    Very accurate and thorough visit notes.
    Mar 24, 2024
    Great dr explained everything to me very well
    Mar 13, 2024
    So far so good with Dr. Excellent discussion and most appreciative of his concerns.
    Mar 06, 2024
    My recent visit with Dr. Ahn was overall a great experience. He had a great bedside manner and provided me with important information regarding his Urological findings to help me make an informed decision about having the HoLEP performed to relieve BPH symptoms.
    Jan 04, 2024
    Dr. Ahn listened to all my concerns and was very professional in explaining and diagnosing the symptoms discussed. He was excellent with all communications.
    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.

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