What to know
- Medicare eligibility does not always mean automatic enrollment.
- Your initial enrollment window generally spans seven months around your 65th birthday.
- Employer coverage can change when—or whether—you should enroll in Part B.
Begin three to six months ahead
Start by confirming whether you will be enrolled automatically or need to apply. People already receiving certain Social Security or Railroad Retirement Board benefits may be enrolled automatically; others generally need to take action.
Gather your current insurance information, prescription list and preferred doctors. You are not choosing a plan yet—you are organizing the facts that will shape the decision.
Check your enrollment window
For most people first eligible at 65, the Initial Enrollment Period begins three months before the month they turn 65, includes their birthday month and ends three months after it.
Coverage start dates can vary depending on when you enroll. Confirm your date directly with Medicare or Social Security rather than relying on a generic birthday calculation.
Ask the employer question
If you or your spouse is actively working and you have group health coverage, ask the benefits administrator how that coverage coordinates with Medicare. Employer size and the type of coverage matter.
COBRA and retiree coverage are not treated the same as active-employment group coverage for every Medicare enrollment rule.
- Will this coverage remain primary after age 65?
- Is the drug coverage considered creditable?
- What happens to an HSA if you enroll in Medicare?
- When does job-based coverage actually end?