There are a number of items to be considered when billing for the Nursing service to perform drug therapy, the charge process is CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL 96372 CPT Code: Injection of drug substance under skin or into muscle 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, CPT Code 20610: Joint Injection and Aspiration Billing Guide Cyanocobalamin Injection, Solution NDC0517 0031 25