H.R.593: To amend title XXI of the Social Security Act to provide grants to promote innovative outreach and enrollment under the Medicaid and State children's health insurance programs, and for other purposes.

Children's Health Insurance Promotion Act of 2007 - Amends title XXI (State Children's Health Insurance) (SCHIP) of the Social Security Act (SSA) to direct the Secretary of Health and Human Services to award grants to eligible entities to: (1) conduct innovative outreach and enrollment efforts that are designed to increase the enrollment and participation of eligible children under SCHIP; and (2) promote understanding of the importance of health insurance coverage for prenatal care and children.

Amends SSA title XIX (Medicaid) to grant a state the option to provide for simplified determinations of a child's financial eligibility for medical assistance under Medicaid or child health assistance under SCHIP.