96372 CPT Code: Injection of drug substance under skin or into muscle What is the correct code for the administration of one vaccine given intramuscularly for a child under eight years of age when the physician counsels the parents? In the CPT Index, look Billing Guidelines for CPT Code 96372 Cyanocobalamin Injection USP 1000 mcg mL Benefits of CPT Code IM Injection with UControl Billing