Medicare in Aberdeen · Brown County, South Dakota · Plan Year 2026
2026 Medicare Plans in Aberdeen, SD
Medicare Advantage plan availability is set at the county level, so Aberdeen residents choose from the Brown County lineup: 1 Medicare Advantage plans for 2026, 1 with a $0 premium, and 100% rated CMS 4★ or higher. Another 8 Medicare Cost plans — a South Dakota specialty — serve the county too. Aberdeen itself is home to 28,297 residents (Census ACS 2023). Below: the city profile, the county's real CMS numbers, and a live tool for your ZIP.
Page last revised: 2026-07-19 · CMS plan data refreshed: 2026-07-19 · Census data retrieved: 2026-08-18
Aberdeen by the numbers
Aberdeen at a glance — and the Brown County Medicare market it belongs to
Sources: U.S. Census Bureau ACS 5-Year Estimates (2023), places — retrieved 2026-08-18 · CMS Medicare Advantage/Part D Landscape (PY2026) · CMS Medicare Monthly Enrollment (county).
Why Aberdeen's plan list is really Brown County's plan list
CMS approves and prices Medicare Advantage, Cost, and Part D plans county by county — there is no such thing as a city-level plan menu. Every Aberdeen address in Brown County sees the same 2026 lineup as the rest of the county, and moving one county over can change the list entirely. That is why the deep data — every plan, premium, out-of-pocket maximum, star rating, and enrollment count — lives on our county Complete Guide:
Brown County, SD: every 2026 plan, premium & rating →
The regional center for northeastern South Dakota, where Medicare Advantage choice is thin and Medicare Cost plans and Medigap carry more of the load.
What Brown County neighbors actually chose
Most-enrolled Medicare Advantage plans available in Aberdeen
County-level CMS enrollment facts, not a recommendation — the right plan depends on your doctors, drugs, and budget.
- AARP Medicare Advantage Patriot No Rx SI-MA2 (PPO) (PPO) — 57 county enrollees
Source: CMS Medicare Advantage Enrollment by State/County/Contract (counts under 11 suppressed by CMS).
A South Dakota specialty
Medicare Cost plans for Aberdeen residents
South Dakota is one of the few states where Medicare Cost plans are still common. They combine plan benefits with a safety valve: outside the network, care simply falls back to Original Medicare rates. Brown County has 8 Cost plans for 2026 from Medica, with 2,204 county enrollees. Full details are on the Brown County guide.
Quality, in CMS's own numbers
How Aberdeen's available plans are rated
| CMS rating | Plans | % of Brown County plans |
|---|---|---|
| 4.5★ | 1 | 100% |
The average CMS rating across the 1 plans available to Aberdeen residents is 4.5. Per-plan ratings, premiums, and out-of-pocket maximums are in the full Brown County tables.
Hospitals serving Aberdeen (Brown County)
- AVERA ST LUKES — Aberdeen · CMS 4★ overall hospital rating
- SANFORD MEDICAL CENTER ABERDEEN — Aberdeen · CMS 4★ overall hospital rating
See your Aberdeen plans now
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When Aberdeen residents can enroll
- Initial Enrollment Period — the 7-month window around your 65th birthday. Medicare 101 →
- Annual Enrollment Period — October 15 to December 7 each year, for 2027 coverage decisions.
- Medicare Advantage Open Enrollment — January 1 to March 31, one switch allowed if you already have an MA plan.
- Special Enrollment Periods — after life events like moving counties, losing employer coverage, or qualifying for Extra Help.
Thinking about a Medigap supplement instead? Your 6-month Medigap open enrollment window starts with Part B — the details, including South Dakota's own rules, are in our South Dakota Medigap guide and Medicare answers.
Aberdeen Medicare questions, answered
How many Medicare Advantage plans are available in Aberdeen, SD for 2026?
Medicare Advantage service areas are approved by CMS at the county level, so Aberdeen residents choose from the Brown County lineup: 1 standard Medicare Advantage plans for 2026, 1 of them with a $0 Part C premium. Another 2 Special Needs Plans serve residents who qualify. 8 Medicare Cost plans also serve the county.
Why does Aberdeen use Brown County's Medicare plan list?
Because CMS approves and prices Medicare Advantage, Cost, and Part D plans county by county, not city by city. Every Aberdeen address inside Brown County sees the same 2026 plan menu as the rest of the county — that's a CMS rule, not an agency choice. The full county data lives on our Brown County Complete Guide.
What does a Medicare Advantage plan cost in Aberdeen for 2026?
Across the 1 plans sold in Brown County, the average Part C premium is $0/month and 1 plans charge $0. The average in-network out-of-pocket maximum is $6,700 (highest: $6,700). You still pay your Part B premium with any plan, and the right plan depends on your doctors and drug list, not the premium alone.
Where can I get free Medicare help in Aberdeen?
Big Sioux Benefits works with Aberdeen residents by phone and video (and in person across the Sioux Falls area) — free, because licensed agents are paid by carriers, not by you. For all options beyond the plans we offer, contact Medicare.gov, 1-800-MEDICARE, or SHIINE, South Dakota's free SHIP counseling program.
Sources, citations, and methodology
- U.S. Census Bureau, American Community Survey 5-Year Estimates (2023), tables B01003 (population), B01002 (median age), B19013 (median household income), B25003 (housing tenure) — incorporated places, South Dakota — retrieved 2026-08-18
- CMS Medicare Advantage/Part D Landscape (PY2026) — accessed 2026-07-19
- CMS Medicare Part C & D Star Ratings (2026) — accessed 2026-07-19
- CMS Medicare Advantage Enrollment by State/County/Contract — accessed 2026-07-19
- CMS Medicare Monthly Enrollment (county) — accessed 2026-07-19
- CMS Hospital Compare — Overall Star Ratings — accessed 2026-07-19
Methodology: city population, median age, median household income, and homeownership are U.S. Census Bureau ACS 5-year estimates (2023) for Aberdeen city, South Dakota. All plan counts, premiums, out-of-pocket maximums, star ratings, and enrollment figures are county-level facts computed from the CMS PY2026 Landscape source files for Brown County — because CMS defines Medicare Advantage service areas by county, they apply to every Aberdeen address in the county. Content is prepared by the Big Sioux Benefits Data Desk and reviewed against the cited files; plan details change — verify with a licensed agent before enrolling.
Big Sioux Benefits is a licensed insurance agency, not affiliated with or endorsed by the U.S. government or the federal Medicare program. We do not offer every plan available in your area. Contact Medicare.gov or 1-800-MEDICARE for all options.
Keep exploring
- Brown County, SD Complete Guide → — every 2026 plan, premium, and rating behind this page.
- South Dakota statewide Medicare guide (2026) — all plans, carriers, and the counties with none.
- South Dakota Medigap (Medicare Supplement) guide — the other half of the decision.
- All areas we serve — every SD county and city guide.
Talk to a licensed Medicare advisor who knows Aberdeen
Free, no pressure — we compare the plans we offer against your doctors, drugs, and budget.