The purpose of this study was to examine the impact of a care coordination intervention aimed at improving the medical home for children with special health care needs (CSHCN). 100 CSHCN referred by a Medicaid managed care plan were randomly assigned to a care coordination intervention or to a wait list comparison group that received standard care. For the intervention group, a care coordinator supported the medical home by consulting with primary care providers at multiple practices to develop an integrated, individualized plan to meet child and family needs. During the second phase of the study, the wait list comparison group received the 6-month intervention. At the end of 12 months, the two groups were combined to examine within subject differences (n = 61). Compared to the control group, participants in the initial intervention group reported a decreased need for information and improved satisfaction with mental health services and specialized therapies. This effect was replicated when the wait list control group received the intervention. Additional benefits were observed in the within subject analysis, including a decline in unmet needs, improved satisfaction with specialty care and care coordination, and improved ratings of child health and family functioning. This intervention improved outcomes for CSHCN and their families by supporting the efforts of primary care physicians to provide comprehensive and coordinated care through the medical home. The consulting care coordinator may provide an efficient and cost effective approach to enhancing the quality of care for CSHCN.