For children currently enrolled in Medicaid and CHIP, the health reform bills in the House and Senate present both potential benefits and risks in terms of the type of coverage these children would have and their access to needed care. This brief estimates the number of children enrolled in Medicaid and CHIP who would have been affected if provisions in pending health reform bills were implemented in 2007. Potential tradeoffs associated with shifting children from CHIP into Medicaid or new exchange plans are discussed.