Already on Medicare · Tool 1 of 4

Which Enrollment Window Am I In Today?

Untangle IEPIEPIEP — The 7-month window around the month you turn 65 to first enroll in Medicare., AEPAEPAEP — October 15–December 7 each year to change Advantage and Part D plans (or switch between Original Medicare and Advantage)., OEPOEPOEP — January 1–March 31. If you are already in an Advantage plan on January 1, you may make one change., GEPGEPGEP — January 1–March 31 to sign up for Part A and/or Part B if you missed your IEP and do not qualify for an SEP., and SEPsSEPSEP — A special window after a qualifying life event (like leaving employer coverage). for your situation.

For official information and to compare all plans in your area, visit Medicare.gov or call 1-800-MEDICARE (TTY 1-877-486-2048). Related: Enrollment periods · Special Enrollment Periods.

Educational estimates only—not Medicare, CMS, or Social Security advice. Figures use published 2026 reference amounts and can change. A licensed agent can review your situation before you choose or change coverage.