It depends. If the only thing done was the injection, even if vitals were taken, then all that should have been billed was the 96372 and the J2796. If something else was addressed beyond the injection with the patient, then the 99211 needs a 25 modifier. Be prepared to have to submit the note, because insurances are cracking down on 99211 when submitted with injections, since it often should not be billed at the same time.