On April 6, 2026, the Centers for Medicare & Medicaid Services published its Contract Year 2027 Medicare Advantage and Part D final rule, effective June 1, 2026, with most provisions applying to coverage beginning January 1, 2027. Tucked inside changes to star ratings and marketing rules is a narrower shift: health reimbursement arrangements, flexible spending accounts and health savings accounts are now excluded from a decades-old disclosure that has told Medicare-eligible accountholders each year whether their coverage measures up to Medicare’s own drug benefit. Before that applicability date, the disclosure duty still stands; after it, account-based plans are free of it.
Why the Final Rule Carries Two Different Dates
The rule is not a proposal. CMS finalized it as the Contract Year 2027 Medicare Advantage and Part D Final Rule, and its own dates section splits the change into two moments: the regulation became binding law on June 1, 2026, while the substantive changes it makes, including the account-based plan exemption, apply once the 2027 coverage year begins. That two-step structure is common in Medicare rulemaking, letting CMS lock a provision into the Code of Federal Regulations months before plans, employers and administrators have to act on it.
The Federal Register text is explicit about that split. It states that the regulations are effective June 1, 2026, and that they are applicable to coverage beginning January 1, 2027, the same construction CMS used elsewhere in the same document to give a separate set of marketing provisions an October 1, 2026 start date. That precedent matters because it shows CMS assigning different starting lines to different pieces of one rule, and nothing in the accompanying fact sheet gives the creditable-coverage exemption an earlier carve-out date of its own.
The creditable-coverage exemption is not an isolated change. It sits inside the same “Reducing Regulatory Burden and Costs in Accordance with Executive Order 14192” section of the rule that waives the Limited Income Newly Eligible Transition program’s toll-free call-center hours and removes restrictions on when licensed agents and brokers may talk with beneficiaries. CMS presents all of these as compliance relief for plans, sponsors and administrators rather than as changes aimed at what beneficiaries themselves see or receive.
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The Notice Account-Based Plans No Longer Must Send
CMS’s own language is specific about which arrangements are covered. The final rule fact sheet describes “exempting account-based plans (such as health reimbursement arrangements, flexible spending accounts, and health savings accounts) from creditable coverage disclosure requirements.” The practical effect is that employers and administrators running these accounts no longer have to determine, each year, whether the coverage tied to the account would pay at least as much as Medicare’s standard Part D benefit, and no longer have to deliver a notice saying so.
That notice has run on a fixed calendar for two decades. Under the Medicare Modernization Act, entities offering prescription drug coverage must give Medicare-eligible policyholders a written disclosure every year before October 15, timed to arrive ahead of the fall window when people decide whether to enroll in a Part D plan. The same entities must separately report their plan’s creditable-coverage status directly to CMS. Account-based plans will still exist inside that broader disclosure system; they will simply no longer be required to participate in it.
The fact sheet’s definition of “account-based plans” reaches beyond the two arrangements the exemption is best known for. It groups flexible spending accounts in with health reimbursement arrangements and health savings accounts, so employers who sponsor FSAs are covered by the same relief even though FSAs rarely come up in conversations about Medicare enrollment. All three are structured as employer- or individual-administered accounts rather than traditional group health plans, which is part of why CMS treated them as one burden-reduction category instead of addressing each separately.
The Late Enrollment Penalty This Notice Was Built to Prevent
The disclosure exists because Part D carries a lasting financial penalty for people who go without creditable coverage too long. A Medicare beneficiary with a continuous gap of 63 days or more without creditable prescription drug coverage, measured from the end of their initial enrollment period, can be assessed a late enrollment penalty that, with limited exceptions, stays attached to their monthly premium for as long as they carry Part D coverage. The disclosure notice was one of the few tools an accountholder had for learning, in real time, whether the coverage they relied on would prevent that penalty from ever attaching.
Losing the notice does not change whether an HSA, HRA or FSA counts as creditable coverage; it changes who is responsible for telling accountholders the answer. Under the regulation governing these disclosures, most entities that offer prescription drug coverage must make that determination annually and report it, an obligation the CY2027 rule now lifts specifically from account-based plans. Someone covered by one of these accounts alongside another employer plan will likely still receive a determination through that other plan, but someone relying on the account-based coverage alone loses a source that previously flagged the question directly.
What remains undefined is how CMS or plan sponsors will otherwise surface the creditable-coverage question to people whose only drug-related coverage runs through an account-based plan. The final rule frames the change as burden reduction for sponsors, not as a consumer-facing communication upgrade, and neither the fact sheet nor the Federal Register text describes a replacement channel for the information the notice used to carry. For the accountholders affected, the practical test arrives with the 2027 coverage year: whether the exemption simply clears away paperwork nobody read, or removes the one document that would have told them a late enrollment penalty was coming.
This article was produced with AI assistance and reviewed by The Money Overview editorial team.
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