The IRMAA system selects the SSNs of beneficiaries who were or are entitled to Medicare
                        Part B or enrolled in a Medicare prescription drug plan with any of the following
                        characteristics in the Medicare Data Base record for the current year:
                     
                     
                        - 
                           
                              • 
                                 Used PY-3 to determine the IRMAA, or 
 
 
- 
                           
                              • 
                                 Beneficiary supplied tax returns for PY-2 or PY-1 MAGI, or 
 
 
- 
                           
                              • 
                                 Beneficiary provided estimate for PY-2 or PY-1, or 
 
 
- 
                           
                              • 
                                 Beneficiary provided statement attesting to no need to file a tax return or IRS transcript
                                    indicating no tax return was filed.
                                  
 
 
                        
                           
                              
                              
                              
                           
                           
                              
                              
                                 
                                 | If | Then | Why | 
                           
                           
                              
                              
                                 
                                 | SSA used PY-3 to determine the current year IRMAA | SSA will ask IRS for PY-2 MAGI and adjust current year IRMAA if necessary.   | Law requires SSA to use PY-2 MAGI information; PY-3 information may be used only temporarily.   | 
                              
                                 
                                 | SSA used a PY-2 or PY-1 MAGI estimate provided by the beneficiary to determine the
                                       current year IRMAA after SSA originally used PY-3
                                     | SSA will ask IRS for PY-2 and PY-1 MAGI (if appropriate) to verify the information
                                       being used for the current year.
                                     | The law usually requires SSA to use PY-2 MAGI to set the premium. However, SSA can
                                       use a more recent tax year if there has been a life-changing event, which results
                                       in a significant reduction in MAGI. SSA needs to know the PY-2 MAGI in order to determine
                                       if the use of a more recent tax year meets the “significant reduction” requirement.
                                       | 
                              
                                 
                                 | SSA used a more recent MAGI estimate provided by the beneficiary to determine the
                                       current year IRMAA after SSA originally used PY-2
                                     | SSA will ask IRS for the MAGI for the tax year of the estimate.   | IRS data is the standard in the law. | 
                              
                                 
                                 | SSA used a signed copy of the beneficiary’s tax return for PY-2 when IRS returned
                                       PY-3 information.
                                     | SSA will ask IRS for PY-2 MAGI. | IRS PY-2 data is the standard in the law. | 
                              
                                 
                                 | SSA used an amended tax return (with proof of IRS acceptance) received from the beneficiary
                                       to determine the current year IRMAA
                                     | No verification takes place. | IRS verification of the amended return was obtained at the time the beneficiary submitted
                                       the return (HI 01120.045)
                                     | 
                              
                                 
                                 | SSA used IRS corrected MAGI information (with proof from IRS) received from the beneficiary
                                       to set the current year IRMAA
                                     | No verification takes place. | IRS verification of the corrected tax data was obtained at the time the beneficiary
                                       submitted the correction (HI 01120.050).
                                     | 
                           
                        
                      
                     NOTE: If we receive information from IRS during verification of the beneficiary supplied
                        data that results in IRMAA equal to or higher than the result of using IRS provided
                        PY-2 data, the IRMAA system will use PY-2 for the IRMAA determination.