I am looking for a calculator (excel, application, vendor, etc) that shows that whenever a modifier is appended to a charge that affects the reimbursement, how it is calculated. For instance, 20610 is billed with 1 unit but we need to add modifier 50 to show bilateral. Modifier 50 reimburses at 1.50 of the wRVU. So, the work rvu for one unit is .79 but, the actual wrvu, due to the modifier would be 1.18. Does anyone know of any program that is available that works with billing software to help determine what the true wRVU value would be?