I am researching Ketamine infusion for pain management of patients with RSD. Usually this is infused over several days; may take a few hours to infuse. Would it be appropriate to bill IV infusion? Possibly 96365 + add-ons as appropriate. Plus the appropriate J code for the Ketamine. My question, is this a billable and payable service to insurances with this diagnosis and use of Ketamine? I am in the early stages of research, so any guidance as to where to start would be helpful. I have researched "Ketamine" in my local Medicare carrier's medical policies, but none appeared. I know all services have to meet medical necessity. How do I determine if Ketamine is appropriate to be used and administered in this way? My gut says that if there is no support for its use in that manner, then the service may not fly as medically necessary. And while Medicare may initially pay for IV infusion, after a review, it may not meet the medical necessity requirement and then be revoked. I want to avoid RACs and any other letter combinations as much as possible!