Urology Specialists of Nevada (USON) is the largest urology group in Southern Nevada with nine providers and three convenient ... locations. We are committed to providing the highest quality and most advanced and comprehensive care to our many patients. What is Urology? Urology is the branch of medicine that focuses on the urinary tracts of both males and females, and on the reproductive system of males. Medical professionals specializing in the field of urology are called urologists and are trained to diagnose, treat, and manage patients with urological disorders. The organs covered by urology include the kidneys, ureters, urinary bladder, urethra, and the male reproductive organs (testes, epididymis, vas deferens, seminal vesicles, prostate and penis and scrotum). read more