Can we bill MRIs of the knee with no radiology report? We only bill code 73721-TC. Currently the radiologist bills the 73721-26. What would be sufficient documentation in case of an audit if there is no interpretation?

We do MRIs for a ortho that has a special knee built for the patient. His office wants us to quit sending the disc to radiology to be read. The ortho has already determined the patient needs a replacement knee.

The purpose of the test is to send disc to manufacturer as a map for the custom knee. (He has his own MRI but it doesn't give enough detail.)