I have a patient that received a new prosthetic leg, and is covered by Aetna Commercial insurance. They paid for all of the codes except for three: L5312 (base code), L5950, and L5622. The denial read, "this service is denied because it is inappropriately coded based on other claims already received for this patient". They are basing it on his amputation surgery (CPT 27590). Anyone have an idea what's up with that one? The payer couldn't give me anything other than it's denied based on the surgery claim code.