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Annual Election Period

Last Updated: May 23, 2026

Annual Election Period (AEP) refers to the yearly Medicare enrollment window when beneficiaries can make changes to their Medicare health plan coverage.

🧠 Full Definition

Annual Election Period (AEP) is the yearly Medicare enrollment period during which beneficiaries may enroll in, switch, or make changes to Medicare health plan coverage.

Historically, the Annual Election Period occurred during November, with coverage changes taking effect the following January. This period served as the primary annual opportunity for Medicare beneficiaries to join Medicare+Choice and other Medicare managed care plans.

The Annual Election Period remains one of the most important Medicare enrollment windows because it allows beneficiaries to review healthcare coverage options and make plan changes based on healthcare needs, provider participation, prescription drug coverage, and healthcare costs.

📌 Key Characteristics

  • Occurs annually during a designated Medicare enrollment window
  • Allows beneficiaries to enroll in or change Medicare health plans
  • Coverage changes typically take effect the following year
  • Applies to Medicare Advantage and other Medicare health plans
  • Functions as a major Medicare enrollment opportunity

💡 Why It Matters

Understanding the Annual Election Period (AEP) helps Medicare beneficiaries make informed healthcare coverage decisions during the yearly enrollment season.

This enrollment period can affect:

  • Medicare Advantage plan enrollment
  • prescription drug coverage changes
  • provider and pharmacy network access
  • healthcare premiums and out-of-pocket costs
  • coverage changes for the upcoming plan year

🌐 MedicarePlans.com Perspective

The Annual Election Period is one of the most important times of the year for Medicare beneficiaries because it provides an opportunity to review healthcare coverage, compare plan options, and make changes based on evolving healthcare needs and costs.

🗣️ Example Use

“During the Annual Election Period (AEP), the beneficiary reviewed Medicare Advantage plans and changed prescription drug coverage for the upcoming year.”

🔗 Related Terms

  • Election Periods
  • Open Enrollment Period
  • Special Election Period
  • Initial Coverage Election Period

📚 Source Definition

Original definition sourced from the Centers for Medicare & Medicaid Services (CMS).

ANNUAL ELECTION PERIOD: The Annual Election Period for Medicare beneficiaries is the month of November each year. Enrollment will begin the following January. Starting in 2002, this is the only time in which all Medicare+Choice health plans will be open and accepting new members. (See Election Periods.)

Page content independently curated and maintained by David W. Bynon, Healthcare AI Governance Architect & Medicare Systems Steward, using a standardized, data-driven methodology designed for accurate, non-commercial Medicare plan interpretation and resolution.

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