CPT Code 20610: Joint Injection and Aspiration Billing Guide CPT Code 99211: Billing Guidelines And Reimbursement Rates When coding for trigger point injections, the documentation must include the site of the injection, the total number of injections and the number of muscles involved. There are two CPT codes Vitamin B 12 Cyanocobalamin Injection 1000 mcg mL Med Plus Physician Supplies 96372 CPT Code Description and Reimbursement Guideline Providers Care Billing LLC