A person who misses the Initial Enrollment Period for Medicare Part B and does not qualify for a Special Enrollment Period may enroll during the General Enrollment Period, which runs:

Why A is correct

The General Enrollment Period (GEP) for Medicare Part B runs each year from January 1 through March 31. Beneficiaries who missed their Initial Enrollment Period and have no Special Enrollment Period may sign up during the GEP, with coverage generally effective later that year, and they may owe a late enrollment penalty. The GEP is one of the three Part B enrollment windows tested in the senior products objectives, along with the Initial Enrollment Period and the Special Enrollment Period.

Why the other options are wrong

• B) October 15 through December 7 is the Annual Election Period for Medicare Part D and Medicare Advantage plans, not the Part B GEP.
• C) November 1 through January 31 is the ACA open enrollment period for health insurance exchanges, not the Medicare Part B GEP.
• D) April 1 through June 30 is not a Medicare enrollment window.

Memory hook

Part B's second chance is the first quarter: January 1 to March 31 — enroll early in the year or wait again.