How do I appeal a claim in which two vaccinations given to a child were not paid by the insurance? 90710 (MMRV) and 90723 (DTaP-HepB-IPV) are appropriate for this child. The insurance, TPA, states they pay 150% of the Medicare allowable. However, these vaccines are not on the Medicare fee schedule. Per the CMS website they are not covered by Medicare. The insurance wrote off the entire balance of both vaccinations. There is no patient responsibility as well. What do I use as my reasoning for these vaccines to be paid? They are appropriate for this patient per the CDC and AAP.