South Dakota Part D plan statistics, 2025–2027
How the stand-alone Medicare Part D market in South Dakota (CMS PDP Region 25) has changed from year to year: the number of plans, what they charge, and what members who kept their plan saw happen to its premium.
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| 2025 | 2026 | 2027 | Change 2026–2027 | |
|---|---|---|---|---|
| Stand-alone plans | 14 | 11 | 9 | −2 |
| Enhanced plans | 8 | 5 | 4 | −1 |
| Basic plans | 6 | 6 | 5 | −1 |
| Plans with a $0 deductible | 3 | 1 | 0 | −1 |
| Plans with a $0 premium | 1 | 0 | 0 | no change |
| $0 premium with full Extra Help | 4 | 4 | 3 | −1 |
| Plans rated 4 stars or more | 0 | 0 | 3 | +3 |
| Lowest monthly premium | $0.00 | $4.70 | $5.30 | +$0.60 (+13%) |
| Median monthly premium | $51.00 | $29.70 | $33.30 | +$3.60 (+12%) |
| Average monthly premium | $63.85 | $56.37 | $80.62 | +$24.25 (+43%) |
| Highest monthly premium | $117.40 | $140.20 | $222.90 | +$82.70 (+59%) |
| Average deductible | $432.71 | $513.73 | $615.22 | +$101.49 (+20%) |
If you keep your 2026 plan into 2027
- Of the 8 plans renewing, the premium went up on 7, down on 1 and stayed the same on 0.
- Median change: +$12.50 a month; average +$26.31.
- The largest rise: AARP Medicare Rx Preferred from UHC (PDP), from $140.20 to $222.90 a month.
- Of the 2026 plans, 2 were merged into another plan. 1 is not offered in 2027.
Counts are of stand-alone prescription drug plans (PDPs) sold in South Dakota; Medicare Advantage plans and employer or union retiree plans are not included. Averages are simple averages across plans, not weighted by enrollment. 2025 figures come from the CMS 2025 Landscape file via the CMS plan crosswalk. A dash means that year’s source does not report the figure. Browse the 2027 South Dakota plans.