KFF's July 28, 2026 state-level analysis of ACA marketplace enrollment found that while national effectuated enrollment fell from 21.8 million to 19.2 million, "New Mexico was the only state to see an increase in effectuated enrollment, growing 14% between 2025 and 2026, coinciding with the state's premium assistance program that fully replaced the expiring federal enhanced tax credits with state-funded subsidies."
This is the outcome that New Mexico's tracked appropriations were meant to produce, and it is the strongest evidence in this corpus that a state backfill actually works. Additional reporting adds the mechanism and scale: enrollment rose about 14.5% from February 2025 to February 2026, roughly 10,000 more people; the state's Health Care Affordability Fund, established in 2021 and expanded in the 2026 session, holds $200 million; Gov. Michelle Lujan Grisham signed a transfer of $91 million into the fund by July 1, 2027 with more than $162 million committed for later fiscal years; authorization runs through 2030; and average net premiums rose just 6.8% to $141 a month, roughly $37 below the national average.
THREE DIFFERENT GROWTH FIGURES CIRCULATE AND ARE DELIBERATELY NOT HARMONIZED HERE because they measure different things: KFF's +14% is effectuated enrollment, the +14.5% is a February-to-February comparison, and a separate +15.4% figure counts plan selections. Note also that one outlet's claim of five million fewer enrollees nationwide conflicts with KFF's approximately 2.6 million effectuated decline — again different measures, flagged rather than reconciled.
For health centers everywhere, New Mexico is now the working policy comparison when a state weighs whether to backfill.