There's Medicaid and then there's the privates.
In Illinois, we don't use the vaccine administration codes for Medicaid. They pay administration fee based on the vaccine code.
The official way is based on components. Thus, DTaP (and TDaP, MMR) is 1 x 90460 and 2 x 90461. MMRV is as above 1 x 90460 and 3 x 90461
As was stated above, sometimes you need a 25 modifier on, and sometimes you don't.
