The dates that matter for 2027.
October 2026 through March 2027. The ones in pink are the deadlines people miss most.
Medicaid changes for some immigrants
Starting October 1, 2026, federal Medicaid and CHIP funding is limited to certain immigrant groups.
Medicare Annual Enrollment begins
You can switch Medicare Advantage or Part D plans.
Marketplace Open Enrollment begins
2027 prices are available. Compare before renewing.
Last day to change Medicare
Changes take effect January 1.
Deadline for January 1 coverage
In HealthCare.gov states.
Your 2027 coverage begins
New immigrant eligibility rules and negotiated prices for 15 Medicare drugs also take effect.
Open Enrollment ends
In HealthCare.gov states. Plans picked from December 16 to this date start February 1. Some states close January 31.
Medicare Advantage window closes
From January 1 to March 31 you can make one change if you have Medicare Advantage.
Life events and Medicaid
If you lose coverage, move, marry or have a baby, you usually have 60 days to enroll. Medicaid and CHIP take applications all year.