Annual Plan Review & Changes
Medicare Part D plans may update premiums, formularies, and cost-sharing structures each year. Reviewing prescription drug coverage annually helps ensure that current medications remain covered under acceptable terms for the upcoming calendar year.
Annual Notice of Change (ANOC)
Each year, Part D plans provide an Annual Notice of Change (ANOC) outlining updates to premiums, deductibles, formularies, and cost-sharing rules for the following plan year. Reviewing this document provides clarity regarding upcoming changes.
Formulary and Tier Adjustments
Drug formularies and tier placement may change from year to year. Medications may move between tiers, require additional authorization, or be removed from coverage. A structural explanation of how tiers function is available in Drug Formularies & Tier Structure.
Cost Structure Updates
Premiums, deductibles, and cost-sharing amounts may be adjusted annually within federal regulatory limits. These updates are reflected in plan documents provided before the start of the new calendar year and may affect how coverage phases operate.
Enrollment Window for Changes
The Annual Enrollment Period (October 15 through December 7) is the primary opportunity to make changes to Part D coverage for the upcoming year. Changes made during this period generally take effect on January 1.
Disclaimer: This information is provided for educational purposes only and is based on publicly available guidance from the Centers for Medicare & Medicaid Services (CMS). It has not been reviewed or endorsed by Medicare, CMS, or any federal agency. This content does not constitute plan-specific advice. For individual coverage questions, please consult a licensed insurance professional.