Labcorp was located inside my Dr.'s office. She ordered a comprehensive blood draw. Medicare denied $57. Medicare told me the code was probably wrong. The Dr.s office corrected and faxed the new code to Labcorp several times. Labcorp never resubmitted to Medicare and has now turned over to collections. I've written letter after letter with supporting documentation and begged them to re-submitt to Medicare. They just ignore siting the Dr. that ordered the test must change the diagnosis. That Dr. Is no longer with that group. The entire practice has been sold to corporate medicine, however my files are still there in that office although I am no longer a patient. I suspect they are just too lazy to follow-up and resubmit to Medicare because Medicare with pay the discounted amount and Labcorp wants more money. After all they have been sued by the government.