CPT 96372: Billing for Therapeutic or Diagnostic Injections Cyanocobalamin Vitamin B12 Injection 1000 mcg Mountainside Medical Benefits of CPT Code IM Injection with UControl Billing There are a number of items to be considered when billing for the Nursing service to perform drug therapy, the charge process is B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL