Newsroom · Sioux Falls

Your Medicare Advantage benefits expire December 31: what Sioux Falls should know before 2027

CMS just rescinded the rule that would have reminded you what's left unspent. Nobody else is going to send that notice now.

Big Sioux Benefits Data Desk

Published September 7, 2026 · 15 min read · Sourced from CMS.gov

If you have a Medicare Advantage plan, you likely have dollars sitting in a dental, vision, hearing, over-the-counter, or grocery allowance right now that you have not spent — and starting with the 2027 plan year, your plan is no longer required to tell you that before it disappears. Most of these allowances reset on a schedule set by your plan, not by you. When the clock runs out, so does the money. For years, federal rule was moving toward requiring a mid-year reminder. This spring, CMS reversed course.

Every figure in this guide comes from a primary source fetched this week: CMS's Contract Year 2027 Medicare Advantage & Part D final rule fact sheet, CMS's Contract Year 2025 final rule fact sheet (the rule that created the notice requirement), KFF's independent analysis of the CY2027 rollback, KFF's 2026 Medicare Advantage benefits analysis, Medicare.gov's own enrollment-period page, and the CMS PY2026 Medicare Advantage plan landscape for Minnehaha County. No numbers from memory.

The reminder you were supposed to get

In 2024, CMS finalized a rule most Medicare Advantage members never heard about, because it hadn't taken effect yet. Buried in the Contract Year 2025 Medicare Advantage and Part D final rule (CMS-4205-F), finalized April 4, 2024, was a new requirement: starting with the 2026 plan year, every Medicare Advantage plan would have to send each enrollee a personalized "Mid-Year Enrollee Notification of Unused Supplemental Benefits" — a letter, mailed between June 30 and July 31 every year, listing exactly which dental, vision, OTC, transportation, or other supplemental benefits that specific person had not used during the first six months of the year, along with the cost-sharing, how to access the benefit, and a phone number to call.

It was, on paper, a genuinely useful consumer protection — the kind of thing that would have caught a lot of quietly wasted money. And it applied for exactly one plan year before CMS took it back.

Think about who that notice was actually built for. It wasn't aimed at the person who logs into their plan's app every month and tracks a flex-card balance like a checking account. It was aimed at the person who signed up for a plan two years ago because it advertised a dental benefit, filed the enrollment paperwork, and hasn't thought about the specifics since — or the adult child in another state trying to keep track of a parent's coverage from a distance, without visibility into what's sitting in an account they don't manage. That's a lot of people. A mailed notice, arriving once a year with a plain list of what you haven't used, doesn't require you to remember a login or navigate a phone tree. It just shows up. Its disappearance shifts that entire burden onto memory and initiative — yours, or a family member's, at exactly the age and stage where tracking one more account gets harder, not easier.

What a "supplemental benefit" actually is

Original Medicare — Part A and Part B — does not cover routine dental care, glasses, hearing aids, over-the-counter medication, groceries, or non-emergency rides to appointments. Medicare Advantage plans (Part C) are allowed to add these as supplemental benefits, and nearly every plan now does, because they've become a major part of how plans compete for enrollment during the Annual Enrollment Period.

These benefits typically arrive in one of two forms. Some are a direct service allowance — a set number of covered dental cleanings, a fitness-center membership, a hearing exam. Others are a dollar allowance loaded onto a debit-style card, often called a flex card or Special Supplemental Benefits for the Chronically Ill (SSBCI) card for plans that qualify, that you spend at approved retailers or providers on approved categories like over-the-counter medication, groceries, or utilities. Either way, the benefit exists inside your plan's Evidence of Coverage — the document that spells out the amount, the reset cycle, and the rules for using it.

Why the money disappears on a schedule

The mechanic is simple once you see it, and it's the same reason a gym membership you don't use still charges you every month: the benefit exists whether or not you claim it, and the plan sets the clock, not you. Per KFF's 2026 analysis of Medicare Advantage plan data, a flex-card or OTC allowance is "often loaded onto a flex card or spending card," and "depending on the plan, this may be a monthly allowance that expires at the end of each month or rolls over month to month until the end of the year, when any unused amount expires."

Notice the two different failure points buried in that one sentence. A monthly allowance that expires at the end of each month can quietly vanish twelve separate times a year — miss August, and August's dollars are gone before September even starts. An annual allowance is more forgiving inside the year but still hits a hard wall on December 31. Some plans blend the two: a quarterly reset, or partial rollover within the plan year but never across into the next one. The only way to know which rule applies to your specific plan is to read your own Evidence of Coverage or ask your plan directly — the mechanic is common, but the exact schedule is not standardized across the industry.

It also matters which kind of card you're holding. A standard OTC or grocery flex-card allowance is a general plan feature, available to anyone enrolled regardless of health status. A Special Supplemental Benefits for the Chronically Ill (SSBCI) card is a different, narrower category — available only to enrollees who meet a plan's specific chronic-condition criteria, and it can cover a wider range of categories, including housing supports, utilities, and non-medical transportation, that a standard flex card usually doesn't touch. Both types run on the same use-it-or-lose-it logic. If you're not sure which kind of card you have, or whether you qualify for the broader SSBCI category, that's a direct question for your plan's member services line — the categories and eligibility rules aren't visible from the outside.

Here's a walkthrough of how this actually plays out for someone who isn't tracking it closely. Say a Sioux Falls retiree enrolls in a Medicare Advantage plan each fall mostly because of the premium and the doctor network, glances at the Summary of Benefits long enough to see "includes dental and OTC benefits," and moves on. January passes. Spring passes. A dental cleaning gets scheduled once, using part of the allowance, but the rest goes untouched because nothing prompts a second look. By September, the plan's Annual Notice of Change arrives describing what changes for next year — not what's left over from this one, which isn't what an ANOC is built to report. Under the rule that applied for 2026, a mid-year notice in July would have already flagged the unused portion two months earlier, with a phone number attached. Under the CY2027 rule, no such letter arrives at all. December 31 comes and goes, the allowance zeroes out, and the enrollee never made an active decision to forfeit it — the calendar just made the decision for them.

The rule CMS just took back

Here's the part that makes this a 2026 story and not just a general Medicare fact. CMS's Contract Year 2027 Medicare Advantage and Part D final rule, finalized April 2, 2026, states plainly that it is "rescinding the requirement for MA plans to send mid-year notices about unused supplemental benefits" — the same requirement created two years earlier in the CY2025 rule, and due to take effect for the very first time in the summer of 2026.

CMS's own fact sheet doesn't spell out a consumer-facing rationale for the reversal. KFF's independent analysis of the same rule reports that CMS pointed to the administrative and financial burden the notice placed on Medicare Advantage organizations — particularly smaller plans that would have needed to consolidate benefit-usage data across multiple third-party vendors to generate an accurate, personalized letter for every enrollee. Whatever the reasoning inside the rule, the practical effect for a Sioux Falls Medicare Advantage member is straightforward: the one federally mandated checkpoint that would have told you, in writing, exactly what you hadn't used — is gone before it ever reached a single mailbox.

Source: CMS — Contract Year 2025 Medicare Advantage & Part D Final Rule, CMS-4205-F (Fact Sheet, Apr. 4, 2024), CMS — Contract Year 2027 Medicare Advantage & Part D Final Rule (Fact Sheet, Apr. 2, 2026) & KFF — Changes to the Medicare Advantage Program Enhance Some Consumer Protections But Roll Back Others (May 1, 2026).

This wasn't the only Medicare Advantage consumer protection the CY2027 rule pulled back. The same final rule eliminated the 48-hour wait between a Scope of Appointment and a one-on-one sales meeting, removed the 12-hour separation between an educational event and a marketing event at the same location, and dropped the requirement that a superlative marketing claim ("best," "top-rated") point to supporting data in the ad itself — changes we cover in full in our 2026 marketing rules guide. The mid-year notice rollback fits a pattern: CMS trimmed several enrollee-facing requirements in the same rule, framed as reducing administrative burden on plans.

What it costs you if you do nothing

There's no invoice for an unused benefit — nobody bills you for the dental cleaning you skipped or the $0 grocery card you forgot about. The cost is quieter than that: it's money you already qualified for, that you paid for indirectly through the plan you chose over a plan without it, sitting unclaimed until it simply stops existing. Nationally, per KFF's own analysis of CMS's 2026 Medicare Advantage Landscape files, these benefits are common enough that most enrollees have at least one to lose track of:

Source: KFF — Medicare Advantage in 2026: Premiums, Out-of-Pocket Limits, Supplemental Benefits, and Prior Authorization (June 5, 2026), based on CMS's 2026 Medicare Advantage Landscape files.

Read that chart plan-benefit by plan-benefit, not as a single number. Ninety-eight percent of individual Medicare Advantage plans offer some dental benefit for 2026 — meaning the overwhelming majority of Sioux Falls Advantage members have a dental allowance sitting somewhere in their plan, whether or not they've used it this year. Sixty-eight percent offer OTC items, the category most often loaded onto a flex card with a monthly or quarterly reset — the fastest-expiring money on this whole list. CMS created the mid-year notice specifically because regulators recognized that a benefit this common is also, for a meaningful share of enrollees, a benefit that goes unused without anyone flagging it. That's the exact gap the rescinded rule was built to close, and the exact gap that reopens for the 2027 plan year.

It's worth being precise about what these percentages do and don't tell you. They measure how many plans offer a benefit category, not how many dollars any individual enrollee actually gets, and not how many people use what they're offered. Two Medicare Advantage plans can both check the box for "OTC benefit" in a CMS landscape file and still hand their members very different allowances, on very different reset schedules, with very different rules about which items qualify. The prevalence chart is the honest starting point — it tells you these benefits are close to universal, not niche add-ons — but it can't substitute for reading your own plan's Summary of Benefits, because the industry-wide average doesn't describe your account.

How to check your own balance, step by step

This is entirely something you can do yourself, in under half an hour, without any help from us. Here's the method.

1. Find your plan ID card and call the member services number on the back. Ask directly: "What supplemental benefits have I not used this year, and when does each one reset — monthly, quarterly, or at year end?" A representative can pull this up while you're on the phone.
2. Log into your plan's member portal or app if you have one. Most flex-card and OTC balances show a running total online, updated faster than a phone call in many cases.
3. Pull your plan's Evidence of Coverage — available on your plan's website or by request — and search for "supplemental benefits" to see the full list of what's included, the dollar or visit amount, and the reset rule in writing.
4. Check your dental, vision, and hearing benefits separately from any flex card. These are often service-based (a set number of covered visits or a dollar cap toward a procedure) rather than a card balance, and they're easy to forget precisely because nothing shows up as a "balance" anywhere.
5. Act with enough lead time. OTC mail orders and dental appointments both take time to process. Checking on December 28 leaves little room to actually use what you find — aim to check by early December at the latest, well before this year's Annual Enrollment Period closes on December 7.

The Sioux Falls Medicare Advantage roster

Minnehaha County has 11 Medicare Advantage (Part C) plans for 2026, serving 39,532 Medicare beneficiaries, per CMS's own PY2026 plan landscape and county enrollment files. Here are the 5 standard PPOs open to anyone with Medicare in the county — each one sets its own supplemental benefit amounts and reset schedule in its own Evidence of Coverage, a level of detail this landscape data doesn't include.

Source: CMS Medicare Advantage / Part D Landscape (PY2026) & CMS Medicare Advantage & Part D Star Ratings (2026), Minnehaha County, 2026.

None of this roster data tells you which of these five plans offers the richest OTC allowance, or whether a specific plan's dental cap resets monthly or annually — that level of detail lives in each plan's own Summary of Benefits and Evidence of Coverage, not in the CMS landscape file this table is built from. Beyond these five, the county also has Dual-Eligible and Institutional Special Needs Plans and Medica Cost plans; we break the full 15-plan drug-carrying roster down in our all-plans guide.

Why this doesn't apply to Medigap

If you have Original Medicare plus a Medigap supplement instead of a Medicare Advantage plan, none of this expiration mechanic touches you — but not because Medigap solved the problem. It's because Medigap never had these benefits to begin with.

Neither structure is simply "better." A Medicare Advantage plan can put real dollars toward dental or OTC costs that Medigap never touches — but only if you actually use them before they expire. A Medigap plan trades that potential extra value for predictable, unlimited Part B coinsurance coverage and no network to navigate. The right fit depends on whether you'd rather manage a use-it-or-lose-it benefit each year or pay more predictably for coverage that doesn't include one.

There's a version of this decision that's easy to miss: someone who picked Medicare Advantage years ago specifically for the dental or OTC allowance, and who has, in practice, let most of it expire unused for several years running. If that's your pattern, it's worth asking honestly whether the plan is still doing what you chose it for, or whether a Medigap supplement — paired with a stand-alone dental policy you'd actually use, or none at all — would leave you with a similar real-world outcome at a more predictable monthly cost. Neither answer is wrong. The point is to make it a decision, not a default.

How a local advisor helps with this

Checking your own benefit balance is something most people can genuinely do alone with a phone call. Where a conversation with us tends to help is the annual coverage review — reading your plan's Evidence of Coverage and Annual Notice of Change with you each fall, flagging which supplemental benefits are shrinking or disappearing for the next plan year, and folding that into a broader plan comparison if switching during the Annual Enrollment Period makes more sense than staying put.

This comes up often with adult children helping a parent from a distance. You may not have login access to a parent's Medicare Advantage member portal, and you may not be on the account when a phone call to member services happens. What you can do is sit down together, in person or by phone, and go through the Evidence of Coverage line by line — the same conversation we have with clients directly. It's a smaller ask than it sounds, and it's exactly the kind of once-a-year check that used to have a federal backstop and, starting with the 2027 plan year, doesn't anymore.

Big Sioux Benefits is a licensed independent agency here in Sioux Falls. We don't work for CMS, Medicare, or any single carrier — carriers pay us, not you, so the conversation costs nothing. We do not offer every plan available in your area; any information we provide is limited to those plans we do offer. For a full picture of all your options, Medicare.gov, 1-800-MEDICARE, and South Dakota's free SHIINE counseling program can help too.

You shouldn't have to remember your own plan's reset calendar on top of everything else Medicare already asks of you once a year. That's exactly the kind of easy-to-miss detail we exist to check with someone once, so it doesn't quietly cost you every December.

What to watch before December 31

1. Check your own benefit balance now — don't wait for a notice that, starting in 2027, is no longer required to arrive.
2. Read your September Annual Notice of Change closely. It tells you what changes for 2027, not what's left unspent in 2026; we cover reading that letter in full in our 2027 ANOC guide.
3. Use the Annual Enrollment Period (October 15–December 7, 2026) for what it's actually for — comparing next year's plan, not recovering this year's unused benefit.
4. Give yourself lead time before December 31 for any dental appointment, OTC order, or transportation booking — the deadline is real and doesn't extend for shipping delays or scheduling backlogs.
5. Watch whether any state or plan-level notice requirement fills the gap. CMS's rule change is federal; a plan can still choose to send a reminder voluntarily, and some may continue doing so even without a mandate.

How we know all this: Big Sioux Benefits runs every article through a data desk that cross-references CMS's own final-rule fact sheets, KFF's independent regulatory and benefits analysis, Medicare.gov's enrollment-period guidance, and the CMS PY2026 Medicare Advantage plan landscape for Minnehaha County — built by Strategic AI Architects. Every figure on this page was fetched from its primary source on September 7, 2026 and carries the period it covers. This is education, not medical or legal advice; confirm your own plan's specific benefits and reset schedule with your plan or a licensed agent. We take no payment from any carrier to feature a plan.