We have just received notice that RR Medicare is denying claims due to a system error on RR Medicare's end. If you have had a claim denied recently with the denial code of CO 50 = These are non-covered services because this is not deemed a "medically necessity" by the payor- Please call RR Medicare's customer service line at 1-888-355-9165 and request that your claim be reprocessed due to the erroneous denial.