Oscar Health doesn’t sell 2026 ACA marketplace plans in Colorado; UnitedHealthcare does, as Rocky Mountain Health Plans. The other insurers selling there are Anthem Blue Cross Blue Shield, Cigna, Denver Health Medical Plan, Kaiser Permanente and Select Health. The right choice depends on your income, which doctors and hospitals you need in-network, and your prescription medications — not which carrier has the better logo.
2026 marketplace check, Colorado: Oscar Health – no plans. UnitedHealthcare – sells plans, as Rocky Mountain Health Plans. Source: Connect for Health Colorado’s 2026 insurer list.
Oscar Health isn’t among the insurers selling 2026 plans on Connect for Health Colorado.
UnitedHealthcare sells 2026 plans on Connect for Health Colorado as Rocky Mountain Health Plans, a UnitedHealthcare company.
Oscar Health vs UnitedHealthcare in Colorado
In Colorado, marketplace plans are sold through Connect for Health Colorado, and neither carrier is on it for 2026. Plan availability, networks, and premiums vary significantly by county and ZIP code across Colorado — what is available in Denver and Colorado Springs is not necessarily available in smaller or rural parts of the state.
The most important thing to understand about comparing any two marketplace carriers: premium is not the same as cost. A plan with a lower monthly premium may have a higher deductible, narrower network, or worse formulary coverage for your medications — resulting in higher total annual spending than a plan that cost more per month.
About Oscar Health in Colorado
Oscar Health isn’t among the insurers selling 2026 plans on Connect for Health Colorado.
Best for: Not an option on the Colorado marketplace in 2026. Enter your ZIP code below and Daniel will compare the insurers that are.
About UnitedHealthcare in Colorado
UnitedHealthcare sells 2026 plans on Connect for Health Colorado as Rocky Mountain Health Plans, a UnitedHealthcare company.
Best for: Colorado shoppers who want a UnitedHealthcare plan; on the marketplace it is sold as Rocky Mountain Health Plans. Enter your ZIP code below and Daniel will compare it with the other insurers in your county.
How to Choose Between the Two
Only UnitedHealthcare sells 2026 marketplace plans in Colorado, as Rocky Mountain Health Plans, so compare it with the other insurers that do: Anthem Blue Cross Blue Shield, Cigna, Denver Health Medical Plan, Kaiser Permanente and Select Health. Compare their after-subsidy premiums, network coverage for your specific doctors, and formulary coverage for your prescriptions before deciding.
If you qualify for ACA subsidies: Compare after-subsidy costs: the cheaper-looking plan before subsidies may not be cheapest after your premium tax credit is applied.
If you are paying full unsubsidized cost: At full unsubsidized cost, total annual cost (premium + expected out-of-pocket) determines value. Consider deductible, OOP max, and network breadth.
Buying for a business, not just yourself?
In Colorado, Oscar Health files no individual plans this year; UnitedHealthcare files as Rocky Mountain Health Plans. Small-group products are filed separately from the individual plans compared above, so nothing here carries over to a group quote. Colorado runs its own marketplace rather than using HealthCare.gov, so the plan menu is filed with the state.
Colorado’s final 2027 rates rise 10% on average, and Cigna is leaving. If you are buying for a business in Colorado the choice widens: these individual plans, a small-group plan, or an ICHRA funding individual coverage. Read how small-group coverage works in Colorado, or put your ZIP code in below and add the headcount.
What to Check Before You Choose
Before selecting either plan, do these four checks using each carrier’s provider directory and formulary tool:
- Doctor check: Search for your primary care physician and any specialists you see regularly in each carrier’s Colorado provider directory. Networks can be narrow, and a doctor who is in-network with one carrier may not be with the other.
- Hospital check: Confirm the hospital you would go to for a planned procedure or emergency is in-network. Hospital network participation differs from physician network participation.
- Drug formulary check: Look up every prescription you take in the formulary for each plan you are considering. Note the tier and the cost-sharing for each. Small formulary differences can result in hundreds of dollars in annual cost difference.
- After-subsidy premium: If you qualify for a premium tax credit, enter your income and household size at Connect for Health Colorado to see the after-subsidy premium for each plan. The after-subsidy number is what you actually pay.
This state has expanded Medicaid. Buyers with income below approximately $21,600/year (single adult) may qualify for free Medicaid coverage instead of a marketplace plan.
An independent broker completes all four checks at no cost to you. Call (713) 575-9904 for a free Oscar Health vs UnitedHealthcare comparison for your Colorado ZIP code.