No, you cannot change your Medicare Advantage plan at any time. Most changes must be made during the Annual Enrollment Period (October 15–December 7), with coverage effective January 1.
If you are already enrolled in a Medicare Advantage plan, you may make one change during the Medicare Advantage Open Enrollment Period (January 1–March 31). You may also qualify for a Special Enrollment Period if you move, lose other coverage, qualify for Medicaid, or are eligible for a Special Needs Plan (SNP), including Chronic Condition (C-SNP) or Dual Eligible (D-SNP) plans.
Because Medicare Advantage provider networks and benefits can change annually, reviewing your plan each year is important.