A person who delays Part B enrollment while covered by employer group health insurance may enroll during the Special Enrollment Period, which lasts:

Why A is correct

The Part B Special Enrollment Period (SEP) allows individuals who delayed enrollment while covered by employer group health insurance to enroll without penalty during an 8-month window that begins when the employer coverage or employment ends. Enrolling within that window avoids the late enrollment penalty. The 8-month SEP is a specific figure in the Part B enrollment material.

Why the other options are wrong

• B) The SEP is 8 months, not 6, and it runs from the end of employer coverage, not from retirement alone.
• C) Twelve months from the 65th birthday is not the SEP structure; the SEP is an 8-month window after group coverage ends.
• D) Two years is not the SEP period; the window is 8 months.

Memory hook

Group coverage ends, an 8-month penalty-free window opens. Enroll inside, dodge the surcharge.

Why A is correct

The Part B Special Enrollment Period for people who had group health coverage based on current employment — their own or a spouse's — lasts eight months, beginning the month after employment or the group coverage ends, whichever comes first. Enrolling during this SEP avoids the Part B late enrollment penalty. This SEP exists only while the group coverage is based on active employment, and its eight-month length is a specific exam number in the Part B enrollment objectives.

Why the other options are wrong

• B) The SEP is eight months, not two years, for employer group coverage after age 65.
• C) Three months after the birthday month is part of the Initial Enrollment Period window, not the employer-coverage SEP.
• D) The SEP for employer group coverage is eight months, not six.

Memory hook

Eight months to get your Part B without penalty after employer coverage stops — a generous second window.

Why A is correct

The Part B Special Enrollment Period is an 8-month window that begins when the employer group coverage ends or employment ends — whichever happens first — provided the worker (or spouse) was covered by group health insurance based on current active employment. Enrolling during the SEP allows the person to pick up Part B without the late-enrollment penalty. The 7-month window is the Initial Enrollment Period tied to the 65th birthday, which is a different enrollment window entirely. This SEP is a key working-after-65 exam fact.

Why the other options are wrong

• B) 7 months is the IEP around the month the person turns 65; the SEP after group coverage ends is 8 months. The IEP is a different 7-month window at age 65.
• C) The SEP is 8 months, not 12, from the end of coverage or employment. The SEP is 8 months, not 12, from the end of coverage or of employment, whichever comes first.
• D) 30 days is far shorter than the actual 8-month SEP window. The actual SEP window is 8 months after the group coverage ends or the job ends, not 30 days.

Memory hook

SEP = 8 months of penalty-free Part B after employer coverage ends. IEP is the birthday window; SEP is the working-life exit window.

Why A is correct

A Special Enrollment Period (SEP) for Medicare Part B allows people who were covered by employer group health insurance after turning 65 to delay Part B without penalty. The SEP lasts for 8 months, beginning the month after group coverage ends or employment ends, whichever comes first. Enrolling during this window avoids the Part B late-enrollment penalty. The 8-month SEP is longer than the 7-month initial window and is specifically designed for working seniors with group coverage, so signing up inside it carries no premium surcharge for the delayed Part B enrollment.

Why the other options are wrong

• B) 4 months is not the Part B SEP duration; the protected window for employer group coverage is 8 months.
• C) The SEP runs from the end of group coverage or employment, whichever comes first, not simply 12 months after retirement.
• D) The SEP is 8 months, not 2 years, and enrolling after it closes generally triggers the late-enrollment penalty.

Memory hook

Working seniors get 8 months after group coverage ends to sign up for Part B, penalty-free.

Why B is correct

A person who delays Medicare Part B enrollment while covered under an employer group health plan, either the person's own or a spouse's, qualifies for a Special Enrollment Period (SEP) of eight months after the group coverage ends or after employment ends, whichever comes first. Enrolling during the SEP avoids the Part B late enrollment penalty. This eight-month window is distinct from the seven-month Initial Enrollment Period and the annual General Enrollment Period.

Why the other options are wrong

• A) Three months is not the Part B SEP window; eight months is the correct period for employer coverage.
• C) Seven months is the length of the Initial Enrollment Period around the 65th birthday, not the employer-coverage SEP.
• D) Twelve months is not a Part B enrollment window under Medicare rules.

Memory hook

Employer coverage keeps you out of the penalty: you get 8 months after the group plan ends to enroll in Part B.