Noridian Medicare Portal Eligibility Enhancements Available April 3, 2021 04/05/2021. Patient Status Code Lookup Available on NMP NMP 06/01/2021. 2020 1099 Tax Forms Available on NMP 02/26/2021. Noridian Medicare Portal to Verify HMO Eligibility and Reduce Claim Errors 02/10/2021..