The Medicare Advantage Disenrollment Period (MADP) is closed.

The Medicare Advantage
Disenrollment Period (MADP) lasts from January 1 through February 14 of
each year. During the MADP, a beneficiary can switch from an MA plan to
traditional Medicare. The new MADP also provides an opportunity to
enroll in a Part D drug plan for those who have not already done so.
When disenrolling from an MA plan during the MADP, the effective date of
disenrollment is the first day of the month following the date the
disenrollment request is received. Thus, disenrollment requests received
by MA organizations in January are effective February 1; those received
February 1 through February 14 are effective March 1. During the MADP,
an individual using the MADP to disenroll from an MA plan is eligible
for a special enrollment period (SEP) to enroll in a stand-alone Part D
prescription drug plan, regardless of whether the MA plan from which the
individual disenrolled included the Part D drug benefit. The old OEP
did not allow a beneficiary to add Part D coverage if he or she did not
previously have such coverage at the beginning of the calendar year.
Beneficiaries are advised to enroll in a PDP as close to the time of
disenrollment from the MA plan as possible in order to avoid having a
gap in drug coverage. For example, a beneficiary who disenrolls from an
MA plan on January 31 and enrolls in a prescription drug plan (PDP) on
February 1 would return to traditional Medicare on February 1, but would
not have drug coverage until March 1.

Learn more.