Medicare Supplement

Can You Switch Medigap in Rapid City? It Depends on Timing

# Can You Switch Medigap in Rapid City? It Depends on…

RAPID CITY, S.D. — If you have a Medicare Supplement (Medigap) policy and you're wondering whether you can switch to a different one, the honest answer is: sometimes yes, easily — and sometimes only if you pass a health review. The rules aren't obvious, and they can be the difference between a smooth switch and a denied application.

Here's a plain-English guide to when you can change Medigap plans, when insurers can look at your health first, and where to check the rules that apply in South Dakota.

Your one-time Medigap Open Enrollment window

When you first enroll in Medicare Part B at age 65 or older, a six-month Medigap Open Enrollment Period begins. During this window, you have the strongest rights you'll ever have: any Medigap insurer selling in your area must sell you any policy they offer at the best available rate, regardless of your health history.

This window only happens once. After it closes, the rules change — and that's where medical underwriting usually comes in.

What "medical underwriting" actually means

Medical underwriting is when an insurance company reviews your health before deciding whether to sell you a Medigap policy, how much to charge, or whether to make you wait for coverage of a pre-existing condition.

If you apply to switch Medigap plans outside a protected window, the insurer can:

• Ask health questions or request medical records
• Charge you more based on your health
• Delay coverage for pre-existing conditions for up to six months
• Turn you down altogether

This doesn't mean switching is a bad idea — plenty of people switch successfully. It just means you should not cancel your current policy until the new one is approved and in force.

Federal guaranteed-issue rights

Federal law protects you from underwriting in certain situations, called "guaranteed-issue" rights. Common examples include:

• Your Medicare Advantage plan leaves Medicare or stops serving your area
• You move out of your plan's service area
• Your employer or union coverage that supplemented Medicare ends
• Your Medigap insurance company goes bankrupt or misleads you
• You joined a Medicare Advantage plan when first eligible for Medicare and want to switch back to Original Medicare within 12 months ("trial right")

In these cases, you generally have 63 days to apply for certain Medigap policies without answering health questions. You can see the full list at medicare.gov under "When can I buy Medigap?"

State rules that may give you more flexibility

Some states go beyond the federal minimums and add their own protections. You may hear about:

• Birthday rules — a window around your birthday each year to switch to an equal or lesser Medigap plan without underwriting.
• Anniversary rules — a similar window tied to your policy's anniversary date.
• Continuous or year-round open enrollment — a state requires insurers to accept applicants without underwriting at any time.

Whether South Dakota offers any of these extra protections is something you should confirm before applying. The best free source in this state is SHIINE (Senior Health Information & Insurance Education), South Dakota's State Health Insurance Assistance Program, which can walk through your specific situation at no cost. You can also contact the South Dakota Division of Insurance.

How this fits with the rest of Medicare in Pennington County

Rapid City is in Pennington County, where residents choose between Original Medicare (often paired with a Medigap policy and a stand-alone Part D drug plan) and Medicare Advantage. Switching Medigap is separate from the fall Annual Enrollment Period (Oct. 15–Dec. 7) and the Medicare Advantage Open Enrollment Period (Jan. 1–March 31), which apply to Medicare Advantage and Part D — not Medigap.

A few 2026 program facts worth keeping in mind as you compare coverage overall:

• Part D has a $2,100 annual out-of-pocket cap.
• The Part D maximum deductible is $615.
• The old coverage gap ("donut hole") is gone as of 2025.
• The Medicare Prescription Payment Plan lets you spread drug costs across the year.
• IRMAA income-based surcharges begin above $109,000 for a single filer.

How to decide whether to try to switch

Before you apply for a new Medigap policy, it helps to work through a few questions:

1. Am I in a protected window? Open enrollment at 65, a guaranteed-issue situation, or a state rule that applies to me. 2. If not, how is my health today? Underwriting can lead to higher premiums or a denial. 3. What am I trying to fix? Cost, customer service, or coverage level. The same lettered plan (for example, Plan G) offers the same core benefits no matter which company sells it. 4. Have I confirmed the new policy is approved before canceling the old one? Never leave yourself uncovered.

A SHIINE counselor or a licensed agent who represents multiple carriers can help you compare apples to apples.