Medicare Part A and Part B – Enrollment Timing and Penalty Rules

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Is There a Penalty for Delaying Medicare Part A?

If you’re eligible for premium-free Medicare Part A, there’s no penalty for delaying enrollment. In fact, there’s technically no “late enrollment” for Part A if you don’t have to pay for it.

Can I Enroll in Part A Only?

Yes — you can choose to enroll in Part A (inpatient care) only, while delaying Part B if you still have other health insurance, such as employer group coverage. Part A will work alongside your other insurance to expand your coverage.

Why Delay Enrolling in Medicare Part B?

Part B has a monthly premium and late enrollment penalties if you don’t sign up when required. Many delay Part B until they are ready for Medicare to be their primary insurance and they cancel other coverage.

When Does Medicare Coverage Start?

Unless you are under 65 and disabled, the earliest Medicare can start is the first day of the month you turn 65. Medicare always begins on the first day of a month.