How Do I Enroll in Medicare in Missouri?

To enroll in Original Medicare, do one of the following:

  • Submit an online application.
  • Apply in person at a Social Security office.
  • Call 800-772-1213 to speak with a Social Security employee.

HelpAdvisor Editorial Team analysis of data from the 2024 MA Landscape Source Files and carrier-provided plan data supplied by SunFire, Inc., a private company that creates software solutions or agents and brokers to compare Medicare plans. For more information, visit www.sunfireinc.com.

Medicare Plans in Missouri

What Missouri Medicare Plans Are Available?

Missourians qualify for Medicare Part A, Part B, Medicare Advantage, Medicare Part D and private Medigap plans that are referred to as Medicare Supplement plans. Much of your coverage is already paid for by the government, but you are still responsible for a portion of your premiums and copayments.

Knowing what you will be responsible for can help you make needed financial plans for your health care. Your Medicare options include the following.

  • Medicare Part A: Considered a part of traditional Medicare, Part A covers costs if you need to visit the hospital or require home health care, nursing or hospice care.
  • Medicare Part B: Also a part of traditional Medicare, Part B covers your preventative care. This would include your routine medical appointments, transportation services, medical devices, supplies and any tests that your doctor requires for medical diagnoses.
  • Medicare Advantage: In 2006, Congress approved a new law that allows Medicare beneficiaries to opt into insurance plans provided by private companies in place of traditional benefits. The law requires these Medicare Advantage plans to provide all of the coverage traditional Medicare provides. The key difference is that you may choose a plan that includes services not covered by Part A or Part B, such as drug coverage, vision or dental.
  • Medicare Part D: This is the traditional Medicare prescription drug plan. You may opt in to Part D regardless of whether you choose Medicare Advantage. One reason for doing so is if your Medicare Advantage plan does not offer prescription drug coverage.
  • Medicare Supplement plans: The purpose of these plans is to cover the cost of medical care that you are responsible for beyond your Medicare plan’s portion of payment for services. For example, after you have satisfied your deductible for the year, you may be required to pay 20% of the cost of medical treatment. A Medicare Supplement plan (also referred to as a Medigap plan) covers the difference.

Whether a plan is best for you will depend on factors such as your health conditions, what type of coverage is more important to you and your ability to afford health care.

If you believe you will struggle with your copays, you may want to consider a Medigap policy.

Who Is Eligible for Missouri Medicare?

If you have recently turned 65 or are coming up on your birthday, you are probably eligible to receive Medicare coverage. Most people are automatically enrolled in traditional Medicare as long as they begin collecting Social Security 4 months before their birthday. If you did not contribute to Social Security for at least ten years during your life or have not started receiving your Social Security benefits, you will need to enroll manually. Failure to enroll soon enough could result in costly penalties, so make sure to do it during your initial enrollment period.

Part A and B

Medicare Part A doesn't require monthly premiums if you or your spouse worked and paid Medicare taxes for at least 40 quarters (10 years).

Medicare Part B comes with a standard monthly premium of $174.90 in 2024, though people with higher incomes could pay more. You may not need to send a payment for your Part B premium if you're eligible for it to be deducted from your pension or Social Security checks each month.

Medicare Advantage

Medicare Advantage plans allow you to choose the terms of your coverage, and while each plan will vary in cost, a portion of it is covered by the government.

You could theoretically pay very little or nothing for a Medicare Advantage plan each month, but if you opt for additional coverage, you may need to pay a higher premium.

Medicare Part D may also vary in cost depending on the level of prescription coverage you seek.

Enroll

As long as you enroll in Medicare during your initial enrollment period, you will not be penalized. This period begins 3 months prior to your birthday and you have another 3 months afterward to enroll. Should you miss this deadline, general enrollment is available from the beginning of the year until the end of March.

If you missed your initial enrollment due to service overseas, being on your employer’s health plan past the age of 65 or because you or a family member suffers from a disability, you may enroll during a special enrollment period and receive coverage without penalty. You will want to act quickly if you are considering enrolling in a Medicare Supplement plan. These plans are offered by private insurers, but you may not be denied coverage or charged more due to your health or age so long as you apply within 6 months of your birthday.

How Do I Enroll in Medicare in Missouri?

Enrolling in Medicare is a simple and straightforward process. You can visit Medicare.gov to check the status of your enrollment, select a different plan or apply for enrollment. Simply follow the directions on the website and you can complete this process from the comfort of home. Medicare Supplement plans are not administered through Medicare, so you will need to work through a private insurer to enroll for Medigap coverage.

HelpAdvisor Editorial Team analysis of data from the 2024 MA Landscape Source Files and carrier-provided plan data supplied by SunFire, Inc., a private company that creates software solutions for agents and brokers to compare Medicare plans. For more information, visit www.sunfireinc.com.

Average Cost of Medicare Advantage Plans in Missouri

Average Cost of Medicare Advantage Plans in Missouri
Average Monthly Premium $46.84
Average in-network out-of-pocket spending limit $5,923.24
Average drug deductible in 2025 (weighted) $476.29
Percentage of plans rated 4 stars or higher 52.5 %

Missouri Medicare Advantage Plans by County

The chart below provides more information about Medicare Advantage plan costs and enrollment in Missouri by county in 2025.

Scroll to the right to continue reading the chart

County Average Premium Average Annual Drug Deductible % of Plans Rates 4 Stars or Higher # of Plans Available
Adair $48 $491 55.2% 28
Andrew $56 $475 54.1% 25
Atchison $54 $485 63.4% 24
Audrain $45 $469 48.1% 40
Barry $42 $463 48.8% 48
Barton $43 $445 52.1% 43
Bates $58 $496 47% 36
Benton $55 $500 60.7% 27
Bollinger $50 $512 53.5% 29
Boone $44 $474 50.8% 42
Buchanan $56 $470 65.4% 20
Butler $48 $505 55.2% 28
Caldwell $57 $500 56.2% 30
Callaway $44 $469 49.5% 41
Camden $49 $505 55% 32
Cape Girardeau $49 $474 51.7% 28
Carroll $55 $500 55.8% 30
Carter $48 $512 55.1% 30
Cass $58 $491 45.6% 37
Cedar $42 $467 53.9% 43
Chariton $47 $493 53.4% 31
Christian $42 $454 46.5% 48
Clark $48 $482 53.5% 27
Clay $51 $441 41.5% 39
Clinton $57 $475 54.5% 27
Cole $44 $510 53.2% 38
Cooper $45 $505 51.8% 37
Crawford $44 $471 49.2% 49
Dade $42 $463 48.6% 46
Dallas $42 $463 47.5% 47
Daviess $56 $475 59.9% 22
Dekalb $54 $485 56% 26
Dent $45 $467 63% 36
Douglas $42 $451 48.6% 42
Dunklin $52 $462 37.3% 21
Franklin $43 $456 50.7% 40
Gasconade $44 $500 58.2% 40
Gentry $56 $475 59.9% 22
Greene $42 $454 47.7% 49
Grundy $54 $485 61.7% 23
Harrison $56 $475 68.5% 19
Henry $55 $490 50.2% 32
Hickory $42 $454 53.9% 37
Holt $54 $485 56% 26
Howard $45 $516 56.8% 33
Howell $44 $470 47.7% 35
Iron $49 $450 50.4% 33
Jackson $48 $452 44.6% 45
Jasper $40 $449 48.8% 48
Jefferson $44 $472 49.3% 55
Johnson $58 $483 47% 32
Knox $43 $511 58.4% 32
Laclede $42 $451 48.6% 42
Lafayette $53 $449 40.8% 41
Lawrence $42 $463 47.5% 47
Lewis $46 $505 56.7% 31
Lincoln $45 $454 54.3% 45
Linn $48 $485 51.7% 28
Livingston $57 $485 67.3% 21
Macon $47 $499 56.9% 29
Madison $49 $440 48.7% 32
Maries $45 $505 51.8% 37
Marion $46 $505 58.4% 30
McDonald $40 $451 49.7% 45
Mercer $54 $485 61.7% 23
Miller $44 $510 54.5% 39
Mississippi $48 $505 55.2% 28
Moniteau $45 $505 51.8% 37
Monroe $47 $499 55.1% 30
Montgomery $44 $517 53.2% 42
Morgan $50 $488 46.8% 34
New Madrid $49 $496 57.1% 27
Newton $40 $449 47.5% 47
Nodaway $56 $475 61.7% 23
Oregon $48 $463 49% 34
Osage $45 $505 51.8% 37
Ozark $42 $454 53.9% 37
Pemiscot $48 $505 58.8% 28
Perry $44 $487 55.1% 38
Pettis $58 $493 57.4% 25
Phelps $46 $480 62.5% 38
Pike $44 $480 53.7% 39
Platte $51 $454 41.5% 43
Polk $42 $463 48.8% 48
Pulaski $44 $464 55.8% 41
Putnam $48 $475 49.8% 27
Ralls $46 $505 56.7% 31
Randolph $48 $491 55.2% 28
Ray $53 $449 41.9% 40
Reynolds $48 $512 58.4% 30
Ripley $49 $505 56.9% 29
Saint Charles $44 $472 49.3% 55
Saint Clair $48 $458 59.7% 31
Saint Francois $44 $476 56.3% 39
Saint Louis $44 $472 49.3% 55
Saint Louis City $44 $464 49.3% 55
Sainte Genevieve $44 $514 62.2% 35
Saline $58 $493 57.4% 25
Schuyler $48 $482 53.5% 27
Scotland $48 $482 53.5% 27
Scott $49 $474 51.7% 28
Shannon $45 $486 55.1% 30
Shelby $43 $511 58.4% 32
Stoddard $48 $505 55.1% 30
Stone $42 $463 48.8% 48
Sullivan $48 $475 49.8% 27
Taney $42 $463 47.5% 47
Texas $45 $486 55.1% 30
Vernon $52 $477 55.7% 38
Warren $44 $476 48% 52
Washington $44 $462 50.3% 50
Wayne $49 $496 53.5% 27
Webster $43 $449 45.1% 47
Worth $56 $475 59.9% 22
Wright $42 $451 48.6% 42

If you would like further assistance with your Medicare enrollment or have questions regarding aid and assistance, you can visit any of the following resources.

CLAIM, State Health Insurance Assistance Program

Missouri Medicaid Eligibility and Enrollment

Missouri CLAIM

The Missouri Rx (MoRx) Plan

Missouri Department of Insurance