Can anyone help us understand what modifier should be used to bill facility surgical claims to CalOptima? They are telling us several different answers or refusing to help at all.

What we are hearing mostly is that we are supposed to bill an AG & UA modifier, however we do not know what order it should be AG,UA or UA,AG. We are also getting conflicting information as to whether or not to include the 51 modifier on additional procedures.

Thank you in advance.