Question: Is 64470 (Injection, anesthetic agent and/or steroid, paravertebral facet joint or facet joint nerve; cervical or thoracic, single level) the correct code for spinal hardware injections to treat pain? New York Subscriber Answer: Although the paravertebral facet joint and facet joint nerve codes (64470-64476) are similar to hardware injections, you should instead submit your claim with 64999 (Unlisted procedure, nervous system). Many practices are hesitant to bill using the unlisted-procedure code because it often slows claim processing, but in your situation, this is your best bet. It isn't correct coding to choose a code "close" to the procedure performed. If no accurate code exists, always use the unlisted-procedure code.