00cefaae_cial_Enrollment_Periods__SEPs___When_does_my_coverage_begin_
[SEP Event] Moving outside of your insurer’s coverage area Gaining citizenship or lawfully present status Gaining status as a member of a federally recognized Indian tribe [When can I enroll?] Up to 60 days after the event [When does my coverage begin?] 
If you enroll within first 15 days of the month, your coverage begins on the first day of the month after you enroll. —or— If you enroll on or after the 16th day of the month, your coverage begins on the first day of the next month after you enroll.
Health First Individual | Special Enrollment Periods (SEPs)
When does my coverage begin?