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, Coverself Navigating CPT Codes for Thoracic and Lower Extremity Fascial Plane Block Procedures CPT Code 20610: Joint Injection and Aspiration Billing Guide CPT Code 20610: Joint Injection and Aspiration Billing Guide CPT codes for spinal injections and radiofrequency denervation Billing Guidelines for CPT Code 96372