Ankle Foot Orthoses

“I billed A5500 and A5512 with modifiers -KX, -RT, -LT. L1940 KXRTLT L2330 KXRTLT L2820 KXRTLT I billed these on separate lines. This claim was rejected so we re-billed putting the KX modifier in the 3rd spot and it was still rejected for the same reason. The comment was: 4 – the procedure code is inconsistent with the modifier used or a required modifier is missing Any thoughts on how to tackle this denial?”

How is one able to determine whether the Same or Similar Rule with respect to Ankle Foot Orthoses applies and how should it be addressed?