Medicare in Missouri 2026
Learn how Medicare works in Missouri, including the state's unique Medigap Anniversary Rule, Medicare Advantage options, prescription drug coverage, and what to know before enrolling or changing plans.
State
Missouri
Medicaid Program
No – Missouri has an Anniversary Rule instead.
Best Used For
Beneficiaries who want flexibility to compare Medicare Supplement companies while keeping the same standardized benefits.
Quick Facts
| State | Missouri |
| Plan Year | 2026 |
| Medicaid Program | No – Missouri has an Anniversary Rule instead. |
| Birthday Rule | No |
| Medigap | Missouri's Anniversary Rule allows many eligible beneficiaries to switch to the same standardized Medicare Supplement plan offered by another insurance company during their annual anniversary period without medical underwriting. |
| Part D | Medicare Part D prescription drug plans are available throughout Missouri for beneficiaries with Original Medicare. Plan premiums, formularies, pharmacy networks, and out-of-pocket costs change each year, so reviewing your prescription drug coverage during the Annual Enrollment Period is recommended. |
| SHIP Program | CLAIM (Community Leaders Assisting the Insured of Missouri) |
| Last Reviewed | 2026-06-11 |
Why Missouri Is Different
Missouri Medicare beneficiaries can choose between Original Medicare with a Medicare Supplement plan or a Medicare Advantage plan. Missouri is one of the few states with a Medigap Anniversary Rule, giving many eligible beneficiaries an annual opportunity to change insurance companies while keeping the same standardized Medicare Supplement benefits. Medicare Advantage plans, provider networks, and benefits vary by county, making annual plan comparisons an important part of managing your Medicare coverage.
Most Common Mistake
Assuming Missouri has a Medigap Birthday Rule or missing the opportunity to use the state's Anniversary Rule to compare Medicare Supplement companies.
Medigap Rules
Missouri's Anniversary Rule allows many eligible beneficiaries to switch to the same standardized Medicare Supplement plan offered by another insurance company during their annual anniversary period without medical underwriting.
Medicare Advantage
Medicare Advantage plans are widely available throughout Missouri, with the greatest selection generally found in the St. Louis, Kansas City, Springfield, and Columbia metropolitan areas. Plan availability, provider networks, premiums, and supplemental benefits vary by county, making annual plan comparisons important.
Part D Prescription Coverage
Medicare Part D prescription drug plans are available throughout Missouri for beneficiaries with Original Medicare. Plan premiums, formularies, pharmacy networks, and out-of-pocket costs change each year, so reviewing your prescription drug coverage during the Annual Enrollment Period is recommended.
Provider Network Notes
Provider networks are generally strongest in metropolitan areas. Rural counties may have fewer participating providers and fewer Medicare Advantage plan options. Always verify that your preferred physicians and hospitals participate before enrolling.
BJC HealthCare; Mercy; CoxHealth; MU Health Care; SSM Health; University Health Kansas City
Moving To or From Missouri
Moving within Missouri or relocating from another state may change your Medicare Advantage and Part D plan options. Review your coverage after any move to ensure your doctors, hospitals, and prescriptions remain covered.
Snowbird Considerations
If you spend part of the year outside Missouri, Original Medicare paired with a Medicare Supplement generally offers greater nationwide flexibility than most Medicare Advantage plans, which rely on regional provider networks.
Long-Term Care
Medicare generally does not cover long-term custodial care. Eligible Missouri residents may qualify for long-term care assistance through MO HealthNet.
Retirement Tax Notes
Missouri allows many retirees to deduct qualifying Social Security benefits and certain retirement income, subject to state income limits and eligibility requirements.
State Assistance Program
CLAIM (Community Leaders Assisting the Insured of Missouri)
Visit SHIP WebsiteSources & Review Date
CMS.gov; Medicare.gov; Missouri Department of Commerce & Insurance; Missouri CLAIM; MO HealthNet
Plan year: 2026
Last content review: 2026-06-11
Last data review: 2026-06-11