Beginning on or after January 1, 2023, individuals who are eligible for Medicare on any basis can enroll (or re-enroll) in Medicare Part B Supplementary Medical Insurance (SMI) and Part A Premium Hospital Insurance (HI) during any months that fall within the duration of the specific exceptional conditions SEPs described below. The duration of each SEP can be found at the link to the specific SEP:

The above SEPs, with the exception of the SEP for Termination of Medicaid Coverage, are for those who missed a Medicare enrollment period due to an exceptional condition that took place on or after January 1, 2023.

When the IEP takes precedence over an SEP

When a beneficiary enrolls in SMI, premium HI, or both, during the IEP, you must always process the enrollment as an IEP enrollment.

If an individual who missed a prior enrollment period due to an exceptional condition enrolls in an SEP during the month of January, February, or March, they can elect to have the enrollment processed as either a General Enrollment Period (GEP) or as an SEP enrollment^[1] .

If the individual chooses a GEP enrollment even if they are eligible for an SEP, coverage begins the first day of the month after the month of enrollment. Calculate the premium surcharge through the end of the enrollment month using HI 01001.010.

If the individual chooses an SEP enrollment, coverage options may vary based on the specific effective date of each exceptional condition SEP. The coverage effective date of each SEP can be found at the link to the specific SEP above.

If an individual is eligible for any exceptional condition SEP and chooses to enroll using the SEP, no Premium Part A and/or Part B premium surcharge is applicable.