Marketplace Coverage and Medicare: Does an ACA Plan Count for Part B?

No. A Marketplace (ACA) plan does not protect you from the Medicare Part B late enrollment penalty. Keeping a Marketplace plan after 65 also eliminates your premium subsidy eligibility. Enroll in Medicare when first eligible.

Frequently Asked Questions

Can I keep my Marketplace plan after I get Medicare?
You can keep it, but you will lose premium tax subsidies once you are eligible for Medicare — and keeping a Marketplace plan does not protect you from Part B late enrollment penalties.
Does a Marketplace plan count as employer coverage for Medicare?
No. Marketplace plans are not employer coverage and do not allow you to delay Part B without penalty. The Medicare Part B late enrollment rules treat Marketplace plans the same as having no qualifying coverage.
When should I switch from Marketplace to Medicare?
You should enroll in Medicare during your Initial Enrollment Period — the 7-month window around your 65th birthday — and cancel your Marketplace plan. Waiting past this window may result in a permanent Part B penalty.