Reviewed by Russell Noga, Licensed Medicare Insurance Broker (all 50 states) — Last updated November 10, 2026
To change Medicare plans online, go to Medicare.gov, open Plan Finder, enter your ZIP code and drugs, compare 2027 plans, and click Enroll on the one you want between October 15 and December 7, 2026. The new plan starts January 1, 2027, and joining it automatically ends your old Medicare Advantage or Part D plan.
2027 by the Numbers
5,481
individual Medicare Advantage plans filed for 2027 (our analysis of CMS plan files)
Dec 7
last day of the fall window to change plans online for January 1, 2027 coverage
3
sign-in services for new Medicare.gov accounts since March 2026: ID.me, CLEAR and Login.gov (CMS)
Medicare’s online tools handle most plan changes from start to finish: comparing costs, checking whether your drugs are covered and submitting the enrollment. What trips people up is the handful of moves the website cannot finish for you, and the small details that decide whether the new plan really works.
This walkthrough follows the order you will see on screen, then lists what happens after you click Enroll. For a closer look at the comparison tool itself, read our 2027 Medicare Advantage plan finder guide.
✔ Based on CMS 2027 data
✔ Free plan comparison
