We recommend that the Centers for Medicare & Medicaid Services work with the DME MACs to do the following, which if in effect during our audit period could have saved Medicare as much as $30,051,107 for wheelchair repairs: review accumulated costs for wheelchair repairs that exceed the federally recommended cost limit, and for those wheelchairs that the DME MACs determine will not remain serviceable for their entire 5-year RUL, enforce Federal requirements by requiring the suppliers that transferred ownership of the wheelchairs purchased on a rental basis to enrollees to furnish replacement wheelchairs to those enrollees at no cost to the enrollees or to Medicare.