Coordinating care, at both systems and individual levels, is important for health system efficiency and good health outcomes. Coordination is needed across settings and across payers and programs, especially for dual eligibles, and vulnerable populations. States are active in building systems of coordinated, integrated care, especially by promoting medical homes and fostering community-based services in lieu of institutional care. The ACA bolsters these existing efforts. The ACA also offers opportunities for testing new models of integrated care, and creates new federal offices with mandates to promote care coordination. Finally, the ACA includes provisions to ensure continuity of care for people transitioning between coverage types.