Medicare Supplement (Medigap) Plans

It reflects the numbers: only about 47,971 of South Dakota's 205,533 Medicare-eligible residents — roughly 23% — are on Medicare Advantage, so most pair Original Medicare with a Medigap plan and a Part D drug plan (CMS PY2026; verify on Medicare.gov). That combination offers broad provider freedom with no networks, which fits a rural state where people travel for care and use doctors across state lines. We help you decide whether that path or Advantage fits you better.

You get a 6-month Medigap Open Enrollment Period that begins when you're 65 and enrolled in Part B, with guaranteed acceptance regardless of health. After that window closes, switching to or between Medigap plans can require medical underwriting, where your health history affects whether you're approved and at what rate. We'll tell you exactly when your window is open and whether a later switch is realistic for your situation.

No. Medigap plans don't include prescription drug coverage. To cover medications, you add a standalone Part D prescription drug plan alongside your Medigap policy — which is why about 113,372 South Dakotans carry a standalone Part D plan (CMS PY2026; verify on Medicare.gov). We set both up together so your hospital, medical, and drug coverage is coordinated, and we check your specific prescriptions against the Part D plans we offer to find the lowest total cost.

Both are strong; the right one depends on how you weigh premium versus copays. Plan G covers your Medicare cost-sharing after the small Part B deductible, with no per-visit copays. Plan N usually has a lower premium but charges small copays for office and emergency visits and doesn't cover Part B excess charges. We compare the real numbers for the plans we offer in your area so you can see which costs less over a year for how you use care.

Any provider that accepts Original Medicare accepts a Medigap plan, because Medigap simply pays your share after Medicare pays its part — there's no separate network to check. That's a major advantage if you travel, see specialists in different states, or want to use providers in both the Sanford and Avera systems. As long as a provider takes Medicare, your Medigap coverage works the same way.

Premiums vary by the plan letter you choose, your age, and the carrier, and the same standardized plan can cost noticeably more from one company than another. Because the benefits are identical for a given letter, shopping carriers is how you save without giving up coverage. We compare the competing prices for the plans we offer so you don't overpay. (Verify current premiums on Medicare.gov or with us directly.)

Medigap is usually the easier fit for frequent travelers and snowbirds, because it has no network — any provider nationwide that accepts Medicare works the same way. A Medicare Advantage PPO can cover out-of-network care too, but at a higher cost share, while an HMO generally only covers emergencies away from home. If you split time between South Dakota and a warmer state or visit family for weeks, we weigh that travel pattern when comparing the two paths.

It depends on the plan letter. Plan G and Plan N cover the Part A hospital deductible and most of your cost-sharing, but newer enrollees can no longer buy plans that cover the Part B deductible — you pay that small annual amount yourself. High-deductible Plan G has you cover more upfront for a lower premium. Because the lettered benefits are standardized, we focus on matching the right letter to your budget and comparing carrier prices.

Inside your 6-month Medigap Open Enrollment Period — and in certain guaranteed-issue situations — carriers must accept you regardless of health. Outside those windows, most Medigap applications go through medical underwriting, so a health condition could lead to a higher rate or a decline. This is exactly why timing matters so much with Medigap. We check whether you're in a protected window and tell you honestly whether a later switch is realistic before you apply.

Yes. Medigap supplements Original Medicare; it doesn't replace it. You keep paying your monthly Part B premium to Medicare, plus your Medigap premium to the insurance company, plus your Part D premium if you add a drug plan. In exchange, Medigap covers most or all of the deductibles, copays, and coinsurance Original Medicare would leave you owing. We map out the full monthly cost — Part B plus Medigap plus Part D — so there are no surprises.