The productive roles that community health workers (CHWs) can play in health care are drawing increasing interest among US policymakers, providers, insurers, and other stakeholders. While there is a growing interest, little has been documented about the scope of practice, supervision, and human resources standards implemented by states and by employers of CHWs, or how CHWs are financed. Such dimensions of implementing CHW models are important to promoting interventions that integrate CHWs. This volume offers four case studies in Texas, Minnesota, North Carolina, and Ohio of interventions that illustrate the challenges and opportunities for integrating CHWs into health systems.