I am a little confused when it comes to the chest rib xray codes.

We have been billing 71100 - rib unilateral 2 views & 71046 - 2 views of the chest.

We have been receiving denials stating we should use 71101 - ribs unilateral 2 views with pa chest minimum of 3 views.

I thought 71101 was for only if we did 2 views of the rib and 1 view of the chest.

Is this correct and we should be using cpt code 71101 or did we list 71100 and 71046 with the 59 modifier on the chest xrays?