multiple surgery rules

We coded a 52204 (CYSTOURETHROSCOPY, WITH BIOPSY) along with a 52310 (CYSTOURETHROSCOPY, WITH REMOVAL OF FOREIGN BODY, CALCULUS, OR URETERAL STENT FROM URETHRA OR BLADDER (SEPARATE PROCEDURE); SIMPLE STENT FROM URETHRA OR BLADDER (SEPARATE PROCEDURE) which the proc 52310 denied as included in the main procedure, but then the first procedure code 52204 was covered at a reduced rate due to multiple surgeries performed on the same day. My question is, can they reduce the rate due to multiple surgeries for the main procedure code of 52204 when they are not allowing the second code (52310) at all?

re: multiple surgery rules

Code 52310 is included in code 52204. No modifier will pass this edit. If 52204 is only procedure allowed, you do not have multiple procedures, if no other procedure (beside 52310). was billed. Do not see the logic of a reduced amt.(modifier 51) for only one procedure.