injection
In the case of vaccines, you can sometimes bill for the vaccine (flu, prevnar, hepatitis, zoster, etc) AND for the injection code. (90471 for non-Medicare,) and G0008 (-flu for Medicare) or G0009 (-Prevnar and pneumonia shots for Medicare), generally speaking. So, 90471, G0008, and G0009 are for the shots (injections) while vaccine products (what is being injected for immunizations) are coded separately.
Office visit code must meet History, Exam, and Med Dec Making qualifications. Office visit in addition to vaccine injections is exemplified in the case where the patient presents for a Wellness, Physical, or Office visit and is offered and given a flu shot or immunization in addition to a documented E & M visit. So the office visit and flu shot (flu vaccine code and injection code), and/or vaccination code plus injection code are all billed together.
There may be exceptions, but generally both an injection code and vaccine code can be billed together, or 2 codes per vaccine administered.