Short answer: For plan year 2026, Missouri has 7 marketplace carriers offering 4,970 plan options across its 115 counties and 10 rating areas. The typical county has 3 carriers to choose from (up to 5), which makes it a moderately competitive market. Full-price premiums for a 40-year-old run from about $365 to $992 per month before subsidies, with a median around $671. Most enrollees pay far less after premium tax credits. (Figures from CMS plan year 2026 marketplace data; reviewed July 2026 by Daniel Griffin, NPN #22052447.)
Who Actually Sells Marketplace Plans in Missouri
Carrier availability in Missouri is decided county by county, not statewide. A carrier with a big statewide reputation may not file plans where you live, and that single fact drives more of your real options than any national comparison chart. Here is how the 7 carriers in Missouri actually cover the state's 115 counties for 2026:
| Carrier | Counties served | Share of state |
|---|---|---|
| UnitedHealthcare | 115 | 100% |
| Ambetter from Home State Health | 109 | 95% |
| Anthem Blue Cross and Blue Shield | 85 | 74% |
| Medica | 54 | 47% |
| Blue Cross and Blue Shield of Kansas City | 30 | 26% |
| Oscar Insurance Company | 15 | 13% |
| Cox HealthPlans | 5 | 4% |
Every one of Missouri's 115 counties has at least two competing marketplace carriers, which is better than many states and generally means more network and price choice.
Lowest-Cost Missouri Plan in Each Metal Tier (Age 40)
These are the lowest-premium plans available somewhere in Missouri at each metal level, with the deductible and out-of-pocket maximum that come with them. Premiums shown are full price before subsidies for a 40-year-old; your actual cost depends on your rating area, age, household, and income.
| Tier | Plan | Carrier | Type | Premium (age 40) | Deductible | OOP max |
|---|---|---|---|---|---|---|
| Catastrophic | Anthem Catastrophic Pathway (+ Incentives) | Anthem Blue Cross and Blue Shield | EPO | $365 | $10,600 | $10,600 |
| Expanded Bronze | Standard Expanded Bronze | Ambetter from Home State Health | EPO | $405 | $7,500 | $10,000 |
| Bronze | Anthem Bronze Pathway 10150 ($0 Virtual PCP + $0 Select Drugs + Incentives) | Anthem Blue Cross and Blue Shield | EPO | $406 | $10,150 | $10,150 |
| Silver | Standard Silver | Ambetter from Home State Health | EPO | $523 | $6,000 | $8,900 |
| Gold | Gold Simple | Oscar Insurance Company | EPO | $510 | $3,300 | $9,950 |
Reading this table: notice how the premium and the deductible move in opposite directions. A Bronze plan wins on monthly cost and loses badly if you actually use care. The right tier depends on your expected utilization and, critically, whether your income qualifies you for cost-sharing reductions — which only attach to Silver plans.
What Age Does to a Missouri Premium
The ACA lets insurers charge a 64-year-old up to three times what they charge a 21-year-old for the same plan. That age curve, not your health, is the biggest driver of your sticker price. Using Missouri's lowest-cost Silver plan as the reference point:
| Age | Full-price monthly premium |
|---|---|
| Age 21 | $409 |
| Age 27 | $429 |
| Age 30 | $465 |
| Age 40 | $523 |
| Age 50 | $731 |
| Age 60 | $1,111 |
This is exactly why subsidies matter more as you get older: the same income at 60 buys a much larger premium tax credit than at 30, because the credit is calculated against the benchmark plan's cost in your area.
Plan Types and Metal Levels Available in Missouri
Plan types: EPO (4,970 plans). Plan type governs out-of-network access — HMO and EPO plans typically cover out-of-network care only in an emergency, while PPO and POS designs cover it at higher cost sharing. If keeping a specific hospital or specialist matters to you, that decision comes before price.
Metal levels: Silver (1,676), Expanded Bronze (1,554), Gold (1,444), Bronze (205), Catastrophic (91). Not every tier is offered in every county, so the mix above is statewide availability rather than a guarantee for your ZIP code.
Before enrolling in any Missouri plan, confirm your hospital and physicians participate in that specific plan's network — not just the carrier's. See how to verify a hospital is in-network.
Subsidies Change These Numbers Completely
Every premium on this page is the unsubsidized sticker price. Premium tax credits are based on household income relative to the federal poverty level and on the benchmark Silver plan in your rating area — which is why two people with identical income in different Missouri counties can receive different credits. If your income falls in the subsidy range, your net premium can be a small fraction of the figures above. If you're self-employed, the calculation runs on your net income after business deductions, which is the single most common place people misestimate and overpay. See how ACA subsidies work and the subsidy estimator.
Note: this page is published for informational purposes. I am not licensed in Missouri and cannot sell, solicit, or negotiate insurance there. To find licensed help in Missouri, use the official marketplace at HealthCare.gov or your state exchange, or your state's department of insurance producer lookup.
Frequently Asked Questions
How many health insurance companies offer marketplace plans in Missouri?
For plan year 2026, 7 carriers offer ACA marketplace plans somewhere in Missouri, across 4,970 total plan options in 115 counties. Availability is local, not statewide: the typical county has 3 carrier(s) available and the most competitive has 5. The broadest carrier is UnitedHealthcare, available in 115 of 115 counties.
How much does health insurance cost per month in Missouri in 2026?
Before subsidies, monthly premiums for a 40-year-old in Missouri range from roughly $365 to $992, with a median near $671, based on CMS plan year 2026 marketplace data. The lowest-cost Silver option starts around $523 at age 40. Premium tax credits are income-based and frequently reduce the net cost dramatically, so the sticker price is rarely what a subsidized enrollee actually pays.
What is the cheapest health insurance plan in Missouri?
The lowest-premium plan in Missouri for a 40-year-old is Standard Expanded Bronze at about $405 per month, but cheapest premium is rarely cheapest overall. Bronze plans carry the highest deductibles, and if your income qualifies you for cost-sharing reductions, a Silver plan usually delivers far better value than Bronze despite the higher premium.
Do Missouri marketplace plans cover pre-existing conditions?
Yes. Every ACA marketplace plan in Missouri must cover pre-existing conditions with no waiting period and no health underwriting, and must include the ten essential health benefits. Carriers cannot deny you or charge more because of health history. Premiums vary only by age, ZIP code rating area, household size, and tobacco use.
What plan types are available in Missouri?
Missouri's 2026 marketplace includes EPO (4,970 plans). Plan type determines out-of-network access: HMO and EPO plans generally cover out-of-network care only in emergencies, while PPO and POS plans cover it at higher cost sharing. If you need a specific hospital or specialist, verify the network before enrolling rather than choosing on premium alone.
When can I enroll in a Missouri marketplace plan?
Open Enrollment runs November 1 through January 15. Outside that window you need a qualifying life event — losing coverage, moving, marriage, a new baby, or certain income changes — which opens a 60-day Special Enrollment Period. Medicaid enrollment is year-round for those who qualify.