Oklahoma residents can use the federal Marketplace at HealthCare.gov to compare health plans, estimate costs and savings, and find coverage options that fits your needs. The federal Marketplace can help you determine whether you qualify for a subsidy or premium tax credit to lower your monthly insurance costs prior to enrolling. Oklahoma’s Health Insurance Marketplace is a central location that provides you with information about Marketplace coverage, enrollment assistance, and answers to common questions before applying for or renewing health coverage.