As of the 2025 plan year, there will be 20 fully state-run health insurance marketplaces (SBMs), three state-based marketplaces that use the federal platform (SBM-FP), and 28 fully federally run marketplaces. Three of the SBMs had an SBM-FP model in 2021, but transitioned to their own enrollment platforms as of the 2022 plan year. Virginia joined them in the fall of 2023, and Georgia will also be running its own exchange platform by the fall of 2024. Illinois has enacted legislation to creat...