Does anyone know what types (i.e. PEEK) spinal fixation biomechnical devices (cages) require a plating system for stabilization? I code for anesthesia only and can't bill the new 22853, 22854, or 22859 because they don't hold any base units for anesthesia. We only can bill the plating systems if they're NOT an integral component of the cage. Normally op reports aren't specific enough to confirm if plate is truly a separate device or just being used for anchoring. Other than reaching out to the surgeons for each case I was trying to research and find info on what components the biomechnical devices include. Any ideas? TIA!!