CMS denied 99213 that was billed with Z76.0, R21. (Pt also had a blood draw done and that was billed with L08.0, R21.) The denial states "This is a non-covered service because it is a routine/preventive exam or a diagnostic/screening procedure done in conjunction with a routine/preventive exam". Can anyone tell us if the OV should not have been billed with the Z code at all or just not with a blood draw? The way I am reading the ICD-10 guidelines is this particular code is considered a Misc and not Routine/administrative. Thanks!