This bill prohibits the use of any federal funds to pay for gender transition procedures, defined broadly to include hormone treatments, puberty-blocking drugs, and surgical interventions. The prohibition applies to all federal programs and agencies, including the military, Veterans Affairs, Medicare, and Medicaid, as well as federal employee health plans. The bill also prevents federal tax credits under the Affordable Care Act from being used for health insurance plans that cover gender transition procedures. However, the legislation includes exceptions for treating complications from transition procedures, addressing disorders of sex development, and treating other serious medical conditions unrelated to gender transition. States and individuals may purchase separate coverage for these procedures using entirely non-federal funds, but they cannot use federal matching funds or subsidies. The restrictions on tax credits take effect one year after the bill's enactment for plan years beginning after that date. The bill does not prevent private insurers or employers from offering such coverage, as long as no federal funds support it.