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Medicare Cost Plans in Sioux Falls 2026: What Medica's 4 Plans Offer — and Who Should Consider Them

Sioux Falls has 4 Medicare Cost plans alongside 5 Advantage PPOs — built on different rules, with a structural advantage that changes the calculation for the right beneficiary.

Big Sioux Benefits Data Desk

Published June 23, 2026 · 10 min read · Sourced from CMS.gov

Most Sioux Falls Medicare beneficiaries know about Medicare Advantage PPOs. Far fewer have heard of Medicare Cost plans — yet Minnehaha County has four of them, all from Medica, all including drug coverage, and all operating on fundamentally different rules than any Medicare Advantage plan. Understanding those rules — especially what happens when you step outside the network — is what makes or breaks the choice for the right person.

Every figure in this article comes from public federal data: the CMS PY2026 Medicare Advantage / Part D Landscape, 2026 CMS star ratings, CMS county enrollment, and CDC PLACES 2023 local health data. No invented numbers.

What is a Medicare Cost plan — and why does it work differently?

A Medicare Cost plan is authorized under Section 1876 of the Social Security Act. Unlike Medicare Advantage, which replaces Original Medicare entirely during your enrollment, a Cost plan works alongside Original Medicare. That one structural difference changes everything about out-of-network care:

• In-network care: Your Cost plan covers the visit using the plan's cost-sharing rules and formulary — just like an MA plan.
• Out-of-network care: Original Medicare steps in automatically and pays at its standard rates (generally 80% of the Medicare-approved amount after the Part B deductible). The Cost plan does not add extra out-of-network charges on top. You revert to standard Medicare as if you weren't in a Cost plan at all.

In practical terms, this matters most for beneficiaries who travel outside the Sioux Falls area, see specialists across the state border in Iowa, or have longtime providers who don't participate in any local Medicare Advantage network. With an MA plan, going out-of-network can mean prior authorization requirements, higher cost-sharing, or — outside of emergencies — denied coverage. With a Cost plan, Original Medicare's rates apply automatically, with no paperwork wall.

Cost plans vs. Medicare Advantage PPOs: structural comparison

Here's how Medica's Cost plans and the local MA PPOs compare on the dimensions that actually drive the decision for Sioux Falls beneficiaries:

Source: CMS Medicare Advantage / Part D Landscape (PY2026); CMS Section 1876 Cost Plan regulations.

The headline trade-off is clear: no Cost plan in Sioux Falls carries a $0 premium, and the range runs from $58.70 to $334.70/month. But Cost plans bring an out-of-network protection that cannot be matched by a lower-premium MA plan — for the beneficiary who needs it, that protection is worth real money on the occasions it triggers.

Medica's 4 Cost plans in Sioux Falls for 2026

All four Cost plans in Minnehaha County come from Medica, a regional carrier with a long footprint in the Dakotas and Minnesota. Each plan bundles Part D drug coverage into the monthly premium — there's no need to add a separate stand-alone drug plan:

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

The Medica Prime Solution Standard w/Rx at $58.70/month is the lowest-premium Cost plan and carries the lowest drug deductible ($250). The Premier w/Rx at $334.70/month sits at the top — typically reflecting a richer formulary tier structure or lower medical cost-sharing benefits. All four hold 3.5★, the same CMS rating as all five local MA PPOs, so quality tier alone doesn't differentiate them. Your specific prescription drug list and how it maps to each plan's formulary is the deciding factor within this group.

Monthly premium landscape: Cost plans vs. MA PPOs side by side

To put the Cost plan premiums in context, here's every standard MA PPO and Cost plan sorted from lowest to highest monthly premium:

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

Two things stand out. First, the two $0-premium MA PPOs (Aetna Signature and Align ChoicePlus) are a compelling value proposition if your providers are firmly in-network and you don't travel. Second, the Medica Standard Cost plan at $58.70/month is not dramatically more expensive than the $52–$80 MA options — and it adds out-of-network coverage none of those plans include. For a beneficiary whose situation calls for that flexibility, $6.70–$34.70 extra per month is a modest price to pay.

The 5 local Medicare Advantage PPOs for comparison

For a complete picture, here are the 5 standard Medicare Advantage PPOs open to any Minnehaha County beneficiary in 2026:

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

Both $0-premium options — Aetna Medicare Signature and Sanford's Align ChoicePlus — sit at 3.5★, matching all four Cost plans on quality. The Align plans are backed by Sanford Health and favor the Sanford network; if your primary care and specialists are at Avera, the Align plans may not be the right fit. The Aetna and Wellmark plans have broader PPO out-of-network access but still apply higher cost-sharing when you step outside preferred network providers.

Drug coverage and the 2026 Part D $2,100 cap

Every one of Medica's 4 Cost plans includes Part D drug coverage bundled into the monthly premium. That means all four are subject to — and provide — the single most important Part D change in the program's history:

Before 2026, there was no annual limit on Part D out-of-pocket drug spending — high-cost specialty medications could push a beneficiary past $10,000 per year. The $2,100 cap eliminates that open-ended exposure. For Sioux Falls beneficiaries managing conditions that drive heavy drug use — including the 10% local diabetes prevalence and the 31.7% high blood pressure rate among Minnehaha County adults — the cap materially changes the cost equation. And it applies whether you're in a Cost plan or a Medicare Advantage plan, so the choice between plan types no longer turns on cap protection alone; it turns on formulary tier placement for your specific medications and on your network needs.

Source: CDC PLACES: Local Data for Better Health, County 2023 (2023); CMS 2026 Part D regulations.

The Sanford-vs-Avera question — and how Cost plans fit in

Sioux Falls is a two-health-system city, and the network alignment of your plan has downstream effects on every specialist referral and hospital stay. Here's the 2026 hospital quality picture:

Source: CMS Hospital Compare — Overall Star Ratings.

Both Sanford USD Medical Center (5★) and Avera McKennan Hospital (4★) are strong performers by any CMS measure. The MA-specific wrinkle: Sanford's own Align plans favor the Sanford network — their lower-premium offerings are structured around Sanford providers and facilities. If your primary care team and specialists are at Avera, the Align plans may not deliver optimal in-network access, even though they're the only $0-premium options in the county.

With a Medica Cost plan, there's no carrier-network allegiance to one system. You use either Sanford or Avera at in-network Cost plan rates. If you cross the state line into northwest Iowa — where Sioux Center and Sioux City specialists often see South Dakota patients — Original Medicare rates apply automatically, with no prior authorization and no extra cost plan charge. That flexibility is structurally unavailable in any MA plan, regardless of how broad its PPO network claims to be.

Local health profile: when Cost plan flexibility matters most

Minnehaha County's 39,532 Medicare beneficiaries carry a chronic-condition burden that shapes the real-world cost calculation for plan choice:

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

High blood pressure (31.7%), obesity (37.4%), arthritis (22.9%), and diabetes (10%) all drive regular specialist visits and prescription drug use. For beneficiaries managing one or more of these conditions who also travel regularly — or who live near the Iowa border and split care between systems — a Cost plan's out-of-network safety net can offset the premium difference in a single complex-care episode. For a beneficiary who is firmly rooted in one local system, rarely travels outside South Dakota, and has providers squarely within a local MA network, the $0-premium MA PPO is likely more cost-effective on an annual basis.

The decision isn't binary. It's a function of three factors: your provider relationships (Sanford, Avera, or mixed/Iowa), your travel patterns, and your drug list. A licensed agent can run the actual numbers — comparing Cost plan premiums plus projected out-of-pocket against a $0-premium MA plan plus its cost-sharing — for your specific situation.

What to watch heading into 2027

1. Check whether Medica renews its Cost plan contracts for South Dakota. Cost plans are a shrinking segment nationally — carriers periodically exit markets. Watch the annual CMS Medicare Advantage and Part D plan landscape announcement (typically released in October) for any contract changes.
2. Track Medica's 2027 premium announcements. Premiums can shift significantly year to year, and the Cost-vs-MA cost comparison changes if the gap narrows to a few dollars or widens past $50/month.
3. If you use Iowa-based providers, confirm cross-border in-network terms. Cost plans provide Original Medicare rates out-of-network automatically, but understanding the in-network tier for Iowa providers under your specific Medica plan helps you plan cost-sharing accurately.
4. Run your formulary comparison every fall. Medica can change drug tier placements at annual renewal. If a key medication moves to a higher tier, the premium savings of a lower-cost plan may not offset the higher cost-sharing on that drug.
5. Monitor the $2,100 Part D cap for future-year adjustments. The cap is a 2026 figure; CMS may index or adjust it in subsequent plan years. Check the CMS Part D cost-sharing guidance each October when plan-year data releases.

How we know all this: Big Sioux Benefits runs every article through a data desk that cross-references the CMS plan landscape, county enrollment, 2026 star ratings, hospital quality data, and CDC health data — 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. We take no payment from any carrier to feature a plan.