Physicians should ensure that an assigned staff member is registered as a Noridian Medicare Portal (NMP) user if their office submitted redetermination and/or reopening requests for Level 1 Medicare Redetermination Notices (MRNs) through the online portal. Only fully favorable (payable) determinations will result in a Remittance Advice; any other MRN decision will be available only in the Appeal Status Inquiry feature in NMP and will not be mailed. For more information, go to the Noridian website at