Injection and Infusion Coding: What You NEED to Know! Not all injections are created equal and in the CPT Medicine section, the difference between an IV infusion, an IM injection, There are a number of items to be considered when billing for the Nursing service to perform drug therapy, the charge process is Billing and Coding: Another New Year of Codes Radiology Today Magazine CPT Code 20610: Joint Injection and Aspiration Billing Guide CPT 96372: Billing for Therapeutic or Diagnostic Injections