Premier Urology Group LLC specializes in the treatment of prostate, bladder and kidney cancers and pediatric urology. Drs. Lehrhoff and Ring are top performers of radioactive seed implantation for prostate cancer. The doctors also specialize in erectile dysfunction. Drs. Lehrhoff and Ring were among the first urologists to perform penile prosthesis surgery as well as utilize the artificial urinary sphincters for incontinence.