Justin Ahn, MD
Assistant Professor
Urology
School of Medicine

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.

• Test characteristics of ultrasound for the diagnosis of peritonsillar abscess: A systematic review and meta-analysis.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2023 Kim DJ, Burton JE, Hammad A, Sabhaney V, Freder J, Bone JN, Ahn JS
• Determinants of ureteral obstruction after percutaneous nephrolithotomy.
  Urolithiasis 2022 Lee HH, Yang H, Martin-Tuite P, Unno R, Hamouche F, Ahn J, Bayne D, Stoller M, Chi T
• Multi-Institutional Variation in Performance of Low-Dose Computed Tomography for the Evaluation of Suspected Nephrolithiasis.
  Journal of endourology 2022 Raskolnikov D, Tzou DT, Ahn JS, Bechis SK, Chi TL, Sorensen MD, Stoller ML, Harper JD
• Adjunctive Use of Point of Care Ultrasound to Diagnose Compartment Syndrome of the Thigh.
  POCUS journal 2021 Long N, Ahn JS, Kim DJ
• Point-of-care ultrasonography in the diagnosis of hemorrhagic cholecystitis.
  CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne 2021 Long ND, Ahn JS, Monkewich GJ, Kim DJ
• Just the facts: ultrasound guidance for arthrocentesis.
  CJEM 2021 Poonja Z, Ahn JS, Kim DJ
• Man With Persistent Chest Pain.
  Annals of emergency medicine 2021 Golby R, Ahn J, Kim DJ
• The physical examination is unreliable in determining the location of the distal fibular physis.
  The American journal of emergency medicine 2021 Dion V, Sabhaney V, Ahn JS, Erdelyi S, Kim DJ
• The erector spinae plane block can facilitate outpatient stone surgery by reducing breakthrough pain.
  BJU international 2021 Yang H, Lee HH, Martin-Tuite P, Chappidi M, Bowman M, Hamouche F, Ahn J, Stoller M, Braehler M, Chi T
• Nedosiran Dramatically Reduces Serum Oxalate in Dialysis-Dependent Primary Hyperoxaluria 1: A Compassionate Use Case Report.
  Urology 2021 Shee K, Ahn J, Hamouche F, Mena J, Chi T, Stoller ML
• Live Renal Ultrasonography Facilitates Double-J Ureteral Stent Insertion at the Bedside: A Pilot Study for the COVID-19 Era.
  Journal of endourology 2020 Yang H, Chappidi M, Overland M, Ahn J, Bayne D, Chi T
• Low Urologist Density Predicts High-Cost Surgical Treatment of Stone Disease.
  Journal of endourology 2020 Bayne DB, Armas-Phan M, Srirangapatanam S, Ahn J, Brown TT, Stoller M, Chi TL
• Ultrasound features of rhabdomyolysis.
  CJEM 2020 Hans PS, Ahn JS, Kim DJ
• 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).
  Journal of pediatric urology 2020 Li Y, Bayne D, Wiener S, Ahn J, Stoller M, Chi T
• Man With Chest Pain.
  Annals of emergency medicine 2020 Arthurs L, Ahn JS, Kim DJ
• Editorial Commentary.
  Urology practice 2020 Ahn JS, Chi TL
• The Impact of Dust and Confinement on Fragmentation of Kidney Stones by Shockwave Lithotripsy in Tissue Phantoms.
  Journal of endourology 2019 Randad A, Ahn J, Bailey MR, Kreider W, Harper JD, Sorensen MD, Maxwell AD
• Acute Ischemic Priapism Management: An Educational and Simulation Curriculum.
  MedEdPORTAL : the journal of teaching and learning resources 2018 Dai JC, Ahn JS, Cannon ST, Walsh TJ, Ostrowski K, Raheem OA, Sherman M, Lendvay TS
• Combined Burst Wave Lithotripsy and Ultrasonic Propulsion for Improved Urinary Stone Fragmentation.
  Journal of endourology 2018 Zwaschka TA, Ahn JS, Cunitz BW, Bailey MR, Dunmire B, Sorensen MD, Harper JD, Maxwell AD
• National Imaging Trends after Percutaneous Nephrolithotomy.
  The Journal of urology 2018 Dai JC, Ahn JS, Holt SK, May PC, Sorensen MD, Harper JD
• National Imaging Trends after Ureteroscopic or Shock Wave Lithotripsy for Nephrolithiasis.
  The Journal of urology 2017 Ahn JS, Holt SK, May PC, Harper JD
• Asteroid Hyalosis: A Mimic of Vitreous Hemorrhage on Point of Care Ultrasound.
  CJEM 2016 Stringer CEA, Ahn JS, Kim DJ
• Using Ultrasound to Enhance Medical Students' Femoral Vascular Physical Examination Skills.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2015 Ahn JS, French AJ, Thiessen ME, Browne V, Deutchman M, Guiton G, Madigosky W, Kendall JL
• Familiarity with radiation exposure dose from diagnostic imaging for acute pulmonary embolism and current patterns of practice.
  CJEM 2014 Ahn JS, Edmonds ML, McLeod SL, Dreyer JF
• Training peer instructors for a combined ultrasound/physical exam curriculum.
  Teaching and learning in medicine 2014 Ahn JS, French AJ, Thiessen ME, Kendall JL
• Spontaneous low cerebrospinal fluid pressure headache: an emergency medicine perspective.
  CJEM 2013 Ahn JS, Akincioglu C, Gulka I, Coome G
• Immunomodulation by hepatitis C virus-derived proteins: targeting human dendritic cells by multiple mechanisms.
  International immunology 2010 Krishnadas DK, Ahn JS, Han J, Kumar R, Agrawal B
• Dendritic cells partially abrogate the regulatory activity of CD4+CD25+ T cells present in the human peripheral blood.
  International immunology 2007 Ahn JS, Krishnadas DK, Agrawal B
• IL-4 is more effective than IL-13 for in vitro differentiation of dendritic cells from peripheral blood mononuclear cells.
  International immunology 2005 Ahn JS, Agrawal B