Hello I am hoping to find someone with experience in billing clinical trials with Q1 modifier, for Medicare/MCA claims. We are trying to determine if the claims are to go directly to Medicare regardless if the patient has MCA plan? And if we do, does Medicare follow the 80/20 rule or do they pay in full for clinical trial cost? If they follow the 80/20 rule do we bill the MCA as secondary? Please advise appropriate billing avenue for clinical trial billing with Q1 modifier (routine care as part of clinical trial).