CPT Code 90471: Immunization Administration Billing Guide Vitamin B Complex: Package Insert Prescribing Information Medical Coding Types Of Injections Coding Clarified Vitamin B 12 Cyanocobalamin Injection 1000 mcg mL Med Plus Physician Supplies Coding Tip of the Week #14 Immunization Administration Codes Explained When reporting vaccine administration, selecting the correct CPT code is essential for accuracy, compliance, and proper reimbursement. Below is a breakdown of Coding Infusions, Hydration, and Injections AAPC Knowledge Center