An official website of the United States government
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Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock () or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
Notice: During the government shutdown, continue using your 2025 health insurance plan and providers. Use this site to apply for and enroll in 2026 coverage during Marketplace Open Enrollment.
A statistical process that takes into account the underlying health status and health spending of the enrollees in an insurance plan when looking at their health care outcomes or health care costs.