I bill for a group practice that is fairly new to private insurance. Our main payer is state medicaid. I am having a hard time trying to get info on how to bill private insurances when services are rendered under a certified addiction counselor...the state of Maryland acknowledges CAC's but most private insurances don't credential them but they do credential the LCSW's or LCPC's who are the supervising providers of each location. Cigna doesn't recognize supervising and I know this isn't the same as "incident to" billing as that is only in a physician setting. I bill on CMS 1500 and trying to figure this out. In most of our offices the CAC or CSC holds the assessments OP or IOP groups for substance tx, how is this billed under private insurances? Any help or hindsight would be greatly appreciated.