I code for our Pulmonalogist and he recently started doing the Manipulation Chest Wall, initial Cpt code 94667 and also the subsequent Manipulation Chest Wall cpt code 94668. The question has came up about billing for the flutter valve, HCPCS S8185, used. I do the billing for the 94667 and 94668 but have not billed anything for the flutter valve given to the patient to take home with them. Any info in regards to billing the S8185 would be greatly appreciated. I've looked on the internet and I have seen where it is not billable to medicare patients, but could we have them sign a waiver and them be billed for the flutter valve????