XYZ, M.D. ,Suite 123, ABC Avenue ,City, STATE 12345 ,RE:  XXXX, XXXX ,MR#:  0000000,Dear Dr. XYZ: ,XXXX was seen in followup in the Pediatric Urology Clinic. 
XYZ , M.D. , Suite 123 , ABC Avenue , City , STATE 12345 , RE : XXXX , XXXX , MR # : 0000000,Dear Dr. XYZ : , XXXX was seen in followup in the Pediatric Urology Clinic .