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, Vaccine Components Explained: Understanding CPT Codes Coding for vaccine administration AAFP Vitamin B Complex: Package Insert Prescribing Information Vaccine and Admin code Billing Guidelines & Medicaid Reimbursement Rate ~ ARLearningOnline