This legislation seeks to amend titles XIX and XXI of the Social Security Act, effectively prohibiting federal financial participation in Medicaid and the Children's Health Insurance Program (CHIP) for individuals who lack verified citizenship, nationality, or satisfactory immigration status. The bill specifically targets amounts expended for medical assistance provided during periods when individuals are given a reasonable opportunity to present documentation, if that status is not ultimately verified. A significant change introduced is the elimination of the state requirement to provide medical assistance during these reasonable opportunity periods for individuals awaiting verification of their status. Previously, states were mandated to continue coverage while documentation was being processed. Under this bill, states would instead have the option to continue providing medical assistance during these periods, but would forfeit federal matching funds if the individual's status remains unverified by the end of the designated period.