Justin Ahn, MD

Title(s)Assistant Professor, Urology
SchoolSchool of Medicine
Address2900 Whipple Avenue, #A610
Redwood City CA 94062
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    UT Southwestern Medical SchoolMD2013
    University of WashingtonResidency2019Urology
    UCSFFellowship2021Endourology and Laparoscopy

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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.

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    Collapse Publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
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    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Reimagining Ambulatory Care in Urology: Conversion of the Urology Clinic into a Procedure Center Improves Patient's Experience. Telemed J E Health. 2024 Mar; 30(3):748-753. Hamouche F, Hakam N, Unno R, Ahn J, Yang H, Bayne D, Stoller ML, Smith S, Finlayson E, Smith J, Chi T. PMID: 37862049.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    2. Globe Rupture Diagnosed with Point-of-Care Ultrasound. J Emerg Med. 2023 11; 65(5):e453-e456. Humniski N, Ahn JS, Manji R, Kim DJ. PMID: 37806809.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    3. Clinical and postoperative characteristics of stentless ureteroscopy patients: a prospective analysis from ReSKU. Can J Urol. 2023 06; 30(3):11532-11537. Hamouche F, Unno R, Hakam N, Charondo LB, Yang H, Ahn J, Bayne DB, Stoller ML, Chi T. PMID: 37344463; PMCID: PMC10396341.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    4. A Novel Standardized Morbidity and Mortality Process to Promote Discourse, Improve Education, and Facilitate Practice Change: The M-PROVE Model. Urol Pract. 2023 07; 10(4):391-397. Bowman M, Yang H, Ahn J, Carroll PR, Hampson LA. PMID: 37228231.
      View in: PubMed   Mentions:
    5. A Narrative Review of Point of Care Ultrasound Assessment of the Optic Nerve in Emergency Medicine. Life (Basel). 2023 Feb 15; 13(2). Lau T, Ahn JS, Manji R, Kim DJ. PMID: 36836888; PMCID: PMC9962087.
      View in: PubMed   Mentions: 2  
    6. Test characteristics of ultrasound for the diagnosis of peritonsillar abscess: A systematic review and meta-analysis. Acad Emerg Med. 2023 08; 30(8):859-869. Kim DJ, Burton JE, Hammad A, Sabhaney V, Freder J, Bone JN, Ahn JS. PMID: 36625850.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    7. Determinants of ureteral obstruction after percutaneous nephrolithotomy. Urolithiasis. 2022 Dec; 50(6):759-764. Lee HH, Yang H, Martin-Tuite P, Unno R, Hamouche F, Ahn J, Bayne D, Stoller M, Chi T. PMID: 36239748; PMCID: PMC9584844.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    8. Multi-Institutional Variation in Performance of Low-Dose Computed Tomography for the Evaluation of Suspected Nephrolithiasis. J Endourol. 2022 10; 36(10):1377-1381. Raskolnikov D, Tzou DT, Ahn JS, Bechis SK, Chi TL, Sorensen MD, Stoller ML, Harper JD. PMID: 35652350.
      View in: PubMed   Mentions:    Fields:    Translation:HumansPHPublic Health
    9. Adjunctive Use of Point of Care Ultrasound to Diagnose Compartment Syndrome of the Thigh. POCUS J. 2021; 6(2):64-66. Long N, Ahn JS, Kim DJ. PMID: 36895668; PMCID: PMC9979932.
      View in: PubMed   Mentions:
    10. Point-of-care ultrasonography in the diagnosis of hemorrhagic cholecystitis. CMAJ. 2021 10 25; 193(42):E1631-E1632. Long ND, Ahn JS, Monkewich GJ, Kim DJ. PMID: 34697098; PMCID: PMC8562984.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    11. Just the facts: ultrasound guidance for arthrocentesis. CJEM. 2021 11; 23(6):737-739. Poonja Z, Ahn JS, Kim DJ. PMID: 34347279.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    12. Man With Persistent Chest Pain. Ann Emerg Med. 2021 08; 78(2):e23-e24. Golby R, Ahn J, Kim DJ. PMID: 34325873.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    13. The physical examination is unreliable in determining the location of the distal fibular physis. Am J Emerg Med. 2021 Dec; 50:97-101. Dion V, Sabhaney V, Ahn JS, Erdelyi S, Kim DJ. PMID: 34325216.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    14. The erector spinae plane block can facilitate outpatient stone surgery by reducing breakthrough pain. BJU Int. 2021 11; 128(5):557-560. Yang H, Lee HH, Martin-Tuite P, Chappidi M, Bowman M, Hamouche F, Ahn J, Stoller M, Braehler M, Chi T. PMID: 34174145.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    15. Nedosiran Dramatically Reduces Serum Oxalate in Dialysis-Dependent Primary Hyperoxaluria 1: A Compassionate Use Case Report. Urology. 2021 Oct; 156:e147-e149. Shee K, Ahn J, Hamouche F, Mena J, Chi T, Stoller ML. PMID: 33774044.
      View in: PubMed   Mentions: 13     Fields:    Translation:Humans
    16. Live Renal Ultrasonography Facilitates Double-J Ureteral Stent Insertion at the Bedside: A Pilot Study for the COVID-19 Era. J Endourol. 2021 07; 35(7):1078-1083. Yang H, Chappidi M, Overland M, Ahn J, Bayne D, Chi T. PMID: 33261510; PMCID: PMC8336250.
      View in: PubMed   Mentions:    Fields:    Translation:HumansCells
    17. Low Urologist Density Predicts High-Cost Surgical Treatment of Stone Disease. J Endourol. 2021 04; 35(4):552-559. Bayne DB, Armas-Phan M, Srirangapatanam S, Ahn J, Brown TT, Stoller M, Chi TL. PMID: 32998584; PMCID: PMC8080904.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    18. Ultrasound features of rhabdomyolysis. CJEM. 2020 Mar 26; 22(3):386-388. Hans PS, Ahn JS, Kim DJ. PMID: 34979798.
      View in: PubMed   Mentions:    Fields:    
    19. Stone formation in patients less than 20 years of age is associated with higher rates of stone recurrence: Results from the Registry for Stones of the Kidney and Ureter (ReSKU). J Pediatr Urol. 2020 06; 16(3):373.e1-373.e6. Li Y, Bayne D, Wiener S, Ahn J, Stoller M, Chi T. PMID: 32280060; PMCID: PMC7308197.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    20. Man With Chest Pain. Ann Emerg Med. 2020 03; 75(3):e15-e16. Arthurs L, Ahn JS, Kim DJ. PMID: 32087868.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    21. Editorial Commentary. Urol Pract. 2020 May; 7(3):172. Ahn JS, Chi TL. PMID: 37317420.
      View in: PubMed   Mentions:
    22. The Impact of Dust and Confinement on Fragmentation of Kidney Stones by Shockwave Lithotripsy in Tissue Phantoms. J Endourol. 2019 05; 33(5):400-406. Randad A, Ahn J, Bailey MR, Kreider W, Harper JD, Sorensen MD, Maxwell AD. PMID: 30595048; PMCID: PMC6533787.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    23. Acute Ischemic Priapism Management: An Educational and Simulation Curriculum. MedEdPORTAL. 2018 07 13; 14:10731. Dai JC, Ahn JS, Cannon ST, Walsh TJ, Ostrowski K, Raheem OA, Sherman M, Lendvay TS. PMID: 30800931; PMCID: PMC6342429.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    24. Combined Burst Wave Lithotripsy and Ultrasonic Propulsion for Improved Urinary Stone Fragmentation. J Endourol. 2018 04; 32(4):344-349. Zwaschka TA, Ahn JS, Cunitz BW, Bailey MR, Dunmire B, Sorensen MD, Harper JD, Maxwell AD. PMID: 29433329; PMCID: PMC5909083.
      View in: PubMed   Mentions: 9     Fields:    Translation:Humans
    25. National Imaging Trends after Percutaneous Nephrolithotomy. J Urol. 2018 07; 200(1):147-153. Dai JC, Ahn JS, Holt SK, May PC, Sorensen MD, Harper JD. PMID: 29409907.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    26. National Imaging Trends after Ureteroscopic or Shock Wave Lithotripsy for Nephrolithiasis. J Urol. 2018 02; 199(2):500-507. Ahn JS, Holt SK, May PC, Harper JD. PMID: 28941916.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    27. Asteroid Hyalosis: A Mimic of Vitreous Hemorrhage on Point of Care Ultrasound. CJEM. 2017 Jul; 19(4):317-320. Stringer CEA, Ahn JS, Kim DJ. PMID: 27573473.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    28. Using Ultrasound to Enhance Medical Students' Femoral Vascular Physical Examination Skills. J Ultrasound Med. 2015 Oct; 34(10):1771-6. Ahn JS, French AJ, Thiessen ME, Browne V, Deutchman M, Guiton G, Madigosky W, Kendall JL. PMID: 26324754.
      View in: PubMed   Mentions: 10     Fields:    Translation:Humans
    29. Familiarity with radiation exposure dose from diagnostic imaging for acute pulmonary embolism and current patterns of practice. CJEM. 2014 Sep; 16(5):393-404. Ahn JS, Edmonds ML, McLeod SL, Dreyer JF. PMID: 25227648.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    30. Training peer instructors for a combined ultrasound/physical exam curriculum. Teach Learn Med. 2014; 26(3):292-5. Ahn JS, French AJ, Thiessen ME, Kendall JL. PMID: 25010242.
      View in: PubMed   Mentions: 23     Fields:    Translation:Humans
    31. Spontaneous low cerebrospinal fluid pressure headache: an emergency medicine perspective. CJEM. 2013 Jan; 15(1):53-8. Ahn JS, Akincioglu C, Gulka I, Coome G. PMID: 23283124.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    32. Immunomodulation by hepatitis C virus-derived proteins: targeting human dendritic cells by multiple mechanisms. Int Immunol. 2010 Jun; 22(6):491-502. Krishnadas DK, Ahn JS, Han J, Kumar R, Agrawal B. PMID: 20410260.
      View in: PubMed   Mentions: 25     Fields:    Translation:HumansCells
    33. Dendritic cells partially abrogate the regulatory activity of CD4+CD25+ T cells present in the human peripheral blood. Int Immunol. 2007 Mar; 19(3):227-37. Ahn JS, Krishnadas DK, Agrawal B. PMID: 17289657.
      View in: PubMed   Mentions: 3     Fields:    Translation:HumansCells
    34. IL-4 is more effective than IL-13 for in vitro differentiation of dendritic cells from peripheral blood mononuclear cells. Int Immunol. 2005 Oct; 17(10):1337-46. Ahn JS, Agrawal B. PMID: 16141241.
      View in: PubMed   Mentions: 11     Fields:    Translation:HumansCells
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