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Health insurance and Medicare enrollment periods

Marketplace health plans and Medicare use different enrollment calendars. Knowing which period applies helps you avoid a coverage gap or a late-enrollment penalty.

Reviewed 2026-07-30 Reviewed by our licensed insurance experts.
01 — Individual & family health plans

Covered California enrollment periods

Open Enrollment is the main annual window when individuals and families can apply for or change Marketplace coverage. It is from November 1st to January 31st every year.

Outside Open Enrollment, a qualifying life event—such as losing job-based coverage, moving, getting married, or having or adopting a child—may create a Special Enrollment Period. Most Covered California special enrollment windows last 60 days.

For 2026 coverage, Covered California’s open-enrollment deadline was January 31, 2026. New plan-year dates should be checked when they are announced.
02 — Medicare (red, white and blue card)

Key Medicare enrollment periods

01

Initial Enrollment Period

Usually, it is within the three months, the current month, and the last three months before you turn 65. This spans a total of 7 months. If you meet the eligibility criteria for participating in medical insurance for some other reason, the specific time period may vary.

02

Medicare Open Enrollment

October 15–December 7 each year: join, drop or switch Medicare Advantage or Part D coverage for January 1.

03

Medicare Advantage Open Enrollment

January 1–March 31: people already in Medicare Advantage can make one allowed plan change or return to Original Medicare.

04

General or Special Enrollment

Part B General Enrollment runs January 1–March 31. Special periods may apply after qualifying employer coverage or other events.

03 — Next steps

Choose the correct path before applying