Multiple Procedure Payment Reduction (MPPR) significantly affects cardiology reimbursement by lowering payment for secondary diagnostic services performed on the same day. With 2026 fee schedule shifts amplifying pressure on non-facility practices, sequencing, modifier accuracy, and scheduling strategy have become critical to protecting margins. Specialized outsourced cardiology billing teams help clinics navigate MPPR rules, prevent avoidable reductions, and stabilize revenue through expert coding, compliance monitoring, and denial management.