Providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Centers for Medicare & Medicaid Services relating to "Patient Protection and Affordable Care Act; Marketplace Integrity and Affordability".

H.J.Res. 123 is a binding joint resolution that would disapprove and nullify a rule issued by the Centers for Medicare & Medicaid Services on June 25, 2025, titled "Patient Protection and Affordable Care Act; Marketplace Integrity and Affordability." If enacted, this resolution would reverse several changes the rule made to how people enroll in health insurance through federal and state exchanges. The rule had required all exchanges to begin open enrollment by November 1 and end by December 31 each year, mandated that exchanges verify eligibility for at least 75 percent of new enrollments through special enrollment periods, and prohibited DACA recipients from enrolling in marketplace plans or state Basic Health Programs.

The resolution would also reverse the rule's prohibition on individual and small group health insurers from covering certain sex-trait modification procedures as an essential health benefit. Currently, the bill is in the early stages of the legislative process, having been introduced in the House in September 2025 and referred to committee. It has not yet been voted on by the full chamber. If passed by both the House and Senate, this joint resolution would become law without requiring the President's signature, making it a binding action that would eliminate the CMS rule's requirements.