On April 26, 2024, the US Department of Health and Human Services (HHS) issued a final rule (press release, fact sheet, FAQs) reinterpreting Section 1557 of the Affordable Care Act, which prohibits discrimination on the basis of race, color, national origin, sex, age or disability, or any combination thereof, in a health program or activity, any part of which is receiving federal financial assistance. The rule, which has staggered effectivity dates starting on July 5, 2024, largely finalizes the policies as proposed in HHS’s August 2022 Notice of Proposed Rulemaking, including clarifying protections for gender-affirming care, as provided by group health plans, carriers and third-party administrators under administrative-services-only (ASO) arrangements.