Medicare Advantage

Aetna Medicare Advantage in South Dakota for 2027: 8 Plans, County by County

SIOUX FALLS — For the 2027 plan year, Aetna (which the Centers for Medicare & Medicaid Services groups as Aetna (CVS Health)) will offer eight Medicare Advantage plans across South Dakota, according to the CMS Medicare Advantage Landscape Source Files for CY2027. All eight are PPO plans, three of them are Dual Eligible Special Needs Plans (D-SNPs), and seven include prescription drug coverage. This explainer, from an independent Medicare education site that is not affiliated with Aetna or any government agency, walks through what South Dakotans will see on the shelf when the Annual Enrollment Period opens.

What is Aetna offering in South Dakota for 2027?

Aetna is offering 8 Medicare Advantage plans statewide in South Dakota for 2027. All 8 are PPOs; 3 are D-SNPs (plans for people enrolled in both Medicare and Medicaid); there are no Chronic Condition SNPs and no Institutional SNPs listed. Seven of the eight plans include Part D prescription drug coverage, and one does not.

For context, four other carriers also offer Medicare Advantage in South Dakota for 2027, bringing the all-carriers total to 28 plans statewide. The counts above are statewide; a plan appearing in Aetna's statewide list may or may not be sold in any one county, which is why county-level checking matters.

Which Aetna plans have the widest county reach in South Dakota for 2027?

Each of Aetna's eight South Dakota plans is listed in 10 counties for 2027, according to the CMS Landscape file, so they share the same statewide footprint on paper. The full plan-by-plan list is rendered as a table on this page.

By name, those plans are Aetna Medicare Dual Classic (PPO D-SNP), Aetna Medicare Eagle Classic (PPO), Aetna Medicare Enhanced Classic Extra (PPO), Aetna Medicare Enhanced Extra (PPO), Aetna Medicare Full Dual (PPO D-SNP), Aetna Medicare Full Dual Classic (PPO D-SNP), Aetna Medicare Signature (PPO) and Aetna Medicare Signature Classic (PPO). Even where a plan is listed, specific benefits, provider networks and drug formularies vary by plan and are not covered here — those come from the plan's own Evidence of Coverage and the Medicare Plan Finder at medicare.gov.

What is new or not returning from Aetna in South Dakota for 2027?

Three Aetna plans are new in South Dakota for 2027, and zero Aetna plans from 2026 are being discontinued. The new entrants are Aetna Medicare Enhanced Extra (PPO), Aetna Medicare Full Dual (PPO D-SNP) and Aetna Medicare Signature (PPO).

Several continuing plans have been renamed between 2026 and 2027. Aetna Medicare Dual (PPO D-SNP) is now Aetna Medicare Dual Classic (PPO D-SNP); Aetna Medicare Eagle (PPO) is now Aetna Medicare Eagle Classic (PPO); Aetna Medicare Enhanced Extra (PPO) from 2026 is now Aetna Medicare Enhanced Classic Extra (PPO); Aetna Medicare Full Dual (PPO D-SNP) from 2026 is now Aetna Medicare Full Dual Classic (PPO D-SNP); and Aetna Medicare Signature (PPO) from 2026 is now Aetna Medicare Signature Classic (PPO). If you were enrolled in one of the 2026 names, you should expect to receive an Annual Notice of Change from Aetna explaining what the renamed plan looks like for 2027.

How do I check whether an Aetna plan is sold in my South Dakota county and covers my doctors and drugs?

Use the Medicare Plan Finder at medicare.gov or call 1-800-MEDICARE (TTY 1-877-486-2048), available 24 hours a day, seven days a week. Enter your ZIP code and county to see which of the eight Aetna plans are actually offered where you live, since a statewide listing does not guarantee county-level availability.

Once you see the plans available in your county, you can enter your prescriptions to check each plan's formulary, and search each plan's provider directory to confirm whether your doctors, specialists and preferred pharmacies are in network. For the fine print — cost-sharing, prior authorization rules, supplemental benefits and travel coverage — read the plan's Summary of Benefits and Evidence of Coverage directly from Aetna. This site does not list premiums, copays, networks or star ratings.

What should South Dakotans do before December 7, 2026?

Before December 7, 2026, review your current coverage against what will be in effect for 2027. The Annual Enrollment Period for Medicare Open Enrollment 2027 runs October 15 – December 7, 2026, and the plan you pick (or keep by default) takes effect January 1, 2027.

A simple checklist: read the Annual Notice of Change from your current plan; make a list of your prescriptions, pharmacies and providers; look up your county on medicare.gov to see every plan available to you — not just Aetna's; and if you qualify for both Medicare and Medicaid, look specifically at the D-SNP options, which include three of Aetna's 2027 plans. There is no need to rush; the deadline is simply a date on the calendar.

Where can South Dakotans get free help with Medicare questions for 2027?

Free, unbiased help is available directly from Medicare at 1-800-MEDICARE (TTY 1-877-486-2048), 24 hours a day, seven days a week, and online at medicare.gov. The Medicare Plan Finder on medicare.gov is the official tool for comparing every Medicare Advantage and Part D plan available in your South Dakota county for 2027.

You can also contact Aetna directly using the member services number on its website or on your plan materials. This site is independent; it is not Medicare, not a government agency, and not an insurance carrier.