There are three points of contact for Medicare related issues.
All issues relating to the warning or reason codes shown against a claim at the time of transmission or as part of a processing report must be directed to Medicare:
For assistance with Medicare Warning codes contact the Medicare eBusiness Centre on 1800 700 199
For assistance with Claim Rejection Reason codes contact the Provider Hotline 132 150
Other issues such as TM2 error messages should be directed to the support team on 1300 855 023