Newsroom · Sioux Falls

Medicare Part A Hospital Costs in Sioux Falls 2026: The Benefit Period Trap, SNF Coverage, and Plugging the $1,632 Gap

Original Medicare has no annual hospital cap — here's every gap you're carrying, and how to close it.

Big Sioux Benefits Data Desk

Published July 6, 2026 · 10 min read · Sourced from CMS.gov

Most Medicare beneficiaries in Sioux Falls know they have a deductible — but very few know it can hit them more than once in the same year, with no annual ceiling above it. Part A's cost-sharing is built around a concept called the "benefit period" that has nothing to do with a calendar year, and the gap between what Medicare pays and what you owe can run into the thousands for a single hospitalization — and reset again 60 days later.

Every figure in this article comes from public federal sources: the CMS 2025 Medicare Parts A & B cost-sharing fact sheet, the CMS Medigap standardization guidance, the CMS PY2026 plan landscape, CMS Hospital Compare, and CDC PLACES 2023 local health data. No invented numbers.

What is a benefit period — and why it matters more than a deductible

A benefit period begins the day you are admitted as a hospital inpatient and ends when you have gone 60 consecutive days without inpatient hospital or skilled nursing facility care. There is no limit to the number of benefit periods you can have in a year. Each new benefit period resets your Part A deductible.

Here is why that matters in practice: If you are hospitalized in February, discharged, and then readmitted in August — after a 60-day gap — you owe the Part A deductible both times. For Minnehaha County's 39,532 Medicare beneficiaries, that means a $1,632 exposure can become a $3,264 exposure with a single readmission.

Source: CMS 2025 Medicare Parts A & B Premiums and Deductibles (Fact Sheet). The $1,632 figure reflects the 2025 published CMS amount; CMS announces the 2026 update in late 2025. Verify at Medicare.gov before enrolling.

The most common exposure scenario: a 5–7 day hospitalization that triggers the deductible, followed by a skilled nursing or rehabilitation stay — where a separate set of cost-sharing rules kicks in.

The skilled nursing facility gap: $204/day on days 21–100

After a hospital stay of at least 3 inpatient days (not observation days — a crucial distinction), Medicare Part A can cover a stint at a skilled nursing facility (SNF). The coverage window is 100 days per benefit period — but it's not free after day 20.

Source: CMS 2025 Medicare Parts A & B Premiums and Deductibles (Fact Sheet). SNF coverage requires a qualifying 3-consecutive-day inpatient hospital admission — outpatient "observation status" does not qualify.

That $204/day coinsurance runs for up to 80 days (days 21 through 100) — a maximum exposure of $16,320 before Medicare stops paying entirely. After day 100, you cover 100% of the costs. The SNF gap is one of the most underestimated exposures in Original Medicare, particularly for beneficiaries recovering from joint replacement surgery, stroke, or a cardiac event — all realistic scenarios given Minnehaha County's health profile.

The Part B gap: 20% with no annual ceiling

The hospital deductible isn't the only open exposure in Original Medicare. Part B covers physician services, outpatient care, and specialist visits — including care during and after a hospitalization. After the $257 annual Part B deductible, you owe 20% of every Medicare-approved amount with no annual ceiling.

For routine care that 20% is manageable. For a complex surgical case with multiple specialists, an imaging series, or an extended outpatient treatment plan — common for Minnehaha County's cancer (8% prevalence) and cardiac (5.5%) populations — the 20% adds up fast and never hits a stop-loss. This is the absence at the center of Original Medicare's design: there is no built-in annual maximum. You are exposed to 20% of Medicare-approved costs for as long as you receive care.

Minnehaha County's hospital-risk profile: why this matters locally

Hospital cost exposure isn't hypothetical for Sioux Falls' 39,532 Medicare beneficiaries. CDC PLACES data shows the chronic-condition rates that drive hospital admissions and readmissions across Minnehaha County adults:

Source: CDC PLACES: Local Data for Better Health, County 2023 (2023, model-based estimates, Minnehaha County adults).

The conditions most directly linked to inpatient hospital admissions: coronary heart disease (5.5%), COPD (5.6%), and high blood pressure (31.7%). Heart failure exacerbations and COPD flares are among the leading causes of hospital readmissions in Medicare nationally. The 22.9% arthritis rate adds a joint-replacement pathway to SNF care. For a population with this profile, the benefit period trap isn't an edge case — it's a predictable cost event.

Your Sioux Falls hospitals: quality data

When you do need inpatient care, your Medicare plan choice determines which hospital you access at the lowest cost. Sioux Falls has two major health systems and a VA medical center, all rated by CMS Hospital Compare:

Source: CMS Hospital Compare — Overall Star Ratings.

Both civilian hospitals participate in Original Medicare, so any beneficiary with Parts A and B can use either at standard Medicare rates. The network question becomes material only with Medicare Advantage: Sanford-backed Align plans (Align ChoicePlus and Align ChoiceElite) have a natural alignment with the Sanford system, and choosing a plan without confirming your specific physicians are in-network can mean higher out-of-pocket costs for non-emergency care. The Sioux Falls VA Medical Center carries a 5-star CMS rating; VA care follows separate access rules for veterans enrolled in VA health benefits.

How Medigap plugs the Part A gaps

Medigap (Medicare Supplement) plans are sold by private insurers and are standardized by CMS under 42 CFR §403.205. Each lettered plan covers the same benefits no matter who sells it — only the premium varies. For beneficiaries first eligible for Medicare on or after January 1, 2020, Plans C and F are not available; the table below shows the eight plans that are.

The columns most relevant to hospital cost exposure: whether the plan covers your Part A deductible, the SNF coinsurance, and excess charges from non-participating providers:

Source: CMS — Choosing a Medigap Policy (Publication 02110), standardized per 42 CFR §403.205. Plans C and F unavailable to beneficiaries first eligible on/after Jan 1, 2020.

Plan G is the most comprehensive option for new enrollees: it covers the Part A deductible, SNF coinsurance, all Part A coinsurance (including extra hospital days), Part B coinsurance, and excess charges. The only gap Plan G leaves is the Part B annual deductible ($257). Plan N covers the same hospital and SNF gaps but omits excess charges and adds a $20 office copay and a $50 emergency room copay — typically available at a lower premium than Plan G, making it the runner-up for beneficiaries comfortable absorbing those copays.

Plans K and L offer partial coverage with lower premiums and their own CMS-set annual out-of-pocket maximums — Plan K at $7,220 and Plan L at $3,610 — making them worth considering for beneficiaries who want a hard ceiling but are willing to share more cost day-to-day.

The catch: outside your initial Medigap open enrollment (which runs for 6 months starting when you enroll in Part B), insurers in most states — including South Dakota — can use medical underwriting to price or deny coverage. Your turning-65 window is the one moment when you have guaranteed issue rights to Medigap with no health questions. That window closes; once it does, switching from Medicare Advantage to Medigap later may require underwriting approval.

How Medicare Advantage handles hospital costs differently

Medicare Advantage (Part C) plans replace Original Medicare's benefit-period structure with a plan-designed cost-sharing schedule and a federally mandated annual maximum out-of-pocket limit for Part A and Part B services. That cap is a structural protection Original Medicare does not provide on its own.

Sioux Falls has 11 Medicare Advantage plans in 2026 — including 5 standard PPOs open to any beneficiary in Minnehaha County:

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

Under Medicare Advantage, you trade the benefit-period deductible structure for per-day or per-admission copays that are clearly stated in each plan's Evidence of Coverage, plus an annual maximum that limits your total Part A and Part B exposure for the plan year. Two plans — Aetna Medicare Signature and Sanford's Align ChoicePlus — carry a $0 monthly premium while still providing that annual cap. The trade-off: you're bound to the plan's network for in-network rates, and the Sanford-vs-Avera question becomes a concrete network decision, not just a preference.

The 2026 Part D out-of-pocket maximum of $2,100 applies regardless of whether you're on a Medicare Advantage plan or Original Medicare with a stand-alone Part D plan — it's a federal floor set by CMS for all drug coverage.

What to watch for in 2026 and beyond

1. Verify the 2026 Part A deductible figure when CMS announces it — the published 2025 figure is $1,632; the 2026 amount is set each fall. Check Medicare.gov or your plan's Annual Notice of Change.
2. Track any upcoming procedures with your doctor — a planned joint replacement or cardiac intervention means a predictable SNF stay is possible, and knowing your coverage gap in advance lets you plan.
3. Confirm inpatient vs. observation status at admission — it controls your SNF coverage eligibility and can change your entire cost picture.
4. If you're on Original Medicare without Medigap, ask about your hospital's billing policy for excess charges — non-participating providers can bill up to 15% above the Medicare-approved amount.
5. Review your plan annually during AEP (Oct 15 – Dec 7) — if your health situation changed and you're now carrying more hospital risk, the premium savings from a $0 Advantage plan may not offset a growing cost-sharing exposure.

How we know all this: Big Sioux Benefits runs every article through a data desk that cross-references the CMS cost-sharing fact sheets, 2026 plan landscape, county enrollment, star ratings, hospital quality data, and CDC PLACES health surveys — built by Strategic AI Architects. Every figure here is from a public federal dataset. This is education, not advice; confirm your plan, costs, and eligibility with a licensed agent or Medicare.gov before making any enrollment decision. We take no payment from any carrier to feature a plan.