HB 3399 expands existing restrictions on gender-transition-related procedures and treatments in Texas. It removes age-based limitations, applying the prohibitions to individuals of all ages. The bill also bans the use of public funds, including Medicaid reimbursements, for gender-transition treatments and bars state agencies from contracting with providers who perform such procedures. It revises exceptions for specific medical conditions and requires individuals currently undergoing treatment to meet stricter requirements for continued care​.