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 organizations interested in promoting or implementing interventions that integrate CHWs. This volume offers four case studies of such interventions that illustrate the challenges and opportunities for integrating CHWs into health systems in specific state and local contexts.