Dr. Bretan is a board-certified urologist and kidney transplant surgeon. He treats a variety of conditions, including kidney, bladder, testicular, and urethral/penile cancer, BPH, erectile dysfunction, male infertility, kidney stones, and pediatric urology. Dr. Bretan earned his medical degree at the University of California, San Francisco, where he completed residencies in general surgery and urology and a fellowship in radiology. He also completed a fellowship at The Cleveland Clinic Foundation in transplantation and renovascular surgery.