You can change your Medicare Part D plan during the Annual Enrollment Period (AEP) from October 15 to December 7 each year. Changes take effect January 1. You should compare Part D plans annually because formularies, premiums, and cost-sharing change each year.
Key Points
- AEP: October 15 - December 7 — change Part D plans
- Changes take effect January 1
- Compare Part D plans annually — formularies and costs change each year
- An independent agent can run a drug cost comparison across all Part D plans
- Review your Annual Notice of Change (ANOC) each September