Check your state VFC program! I believe most states cover the vaccine admin codes 90460 and 90461. Yes should be billing these - you're losing out on a lot of money if you're not!
What do you mean you can't add codes with price options? Like in AC? Yes you can. But for us, we don't add the vaccine and vaccine admin codes in AC. We have a paper superbill and the billing person adds them in the PM software. The doctor selects the E&M code in AC only and that goes over to the PM software automatically. Just better workflow this way.
This AAP page has a lot of info on vaccine billing if you need to start with the basics:
https://www.aap.org/en/practice-man...-valuation/vaccine-financing-and-coding/How to bill vaccine admin:
https://downloads.aap.org/AAP/PDF/AAP%20Position%20Paper%20EM%20IA.pdfWhat other billing issues do you have? I love this topic.