Kids First Act

Kids First Act - Amends title XXI (State Children's Health Insurance) (SCHIP) of the Social Security Act (SSA) to revise, reauthorize, and extend the SCHIP program through FY2012 at increased levels.

Provides for determination of allotments for the 50 states and the District of Columbia based on expenditures and numbers of low-income children.

Sets limitations on matching rates for populations other than targeted low-income children or pregnant women covered through a Section 1115 waiver.

Prohibits the Secretary of Health and Human Services from approving, extending, renewing, or amending a waiver, experimental, pilot, or demonstration project with respect to a state after the enactment of this Act that would allow funds made available under SCHIP to be used to provide child health assistance or other health benefits coverage for any other adult other than a pregnant woman whose family income does not exceed the income eligibility level specified for a targeted low-income child in that state under a waiver or approved project.

Requires a state to determine family income eligibility for child health assistance or other health benefits coverage under the state child health plan solely on the basis of the family's gross income.

Directs the Secretary to award grants to eligible entities to conduct outreach and enrollment efforts designed to increase the enrollment and participation of eligible children under SCHIP and SSA title XIX (Medicaid).

Allows any state the option to include an unborn child as a child under SCHIP.

Repeals current federal payment rates at different specified percentages for different specified aspects of Medicaid administrative costs to prescribe a flat 50% rate for all such costs.

Requires a 25% reduction in payments for Medicaid administrative costs (to prevent duplication of such payments under part A (Temporary Assistance for Needy Families) (TANF) of SSA title IV).