urologist
Medical specialist who treats urinary tract and male reproductive system disorders.
My father has worked as a urologist for 30 years.
You should see a urologist.
泌尿器科 is the medical department of urology, while 泌尿器科医 is the doctor specializing in it.
Compound of 泌尿器 (urinary organs) + 科 (department) + 医 (doctor).