Under the ACA, Medicaid beneficiaries are eligible for health home services if they have at least two chronic conditions, or one chronic condition and risk factors for another, or one serious and persistent mental health condition. Services include comprehensive care management, care coordination and health promotion, comprehensive transitional care from inpatient to other settings, patient and family support, referral to community and social support services, and use of health information technology to link services. Services may be provided by a designated health provider, such as a physician practice, a team of health care professionals linked to a designated provider, or a community health team. The 16-page Kaiser brief outlines similarities and differences in the four states' health home programs. For example, all four states have implemented health homes on a statewide basis rather than in a limited geographic area. All four are targeting individuals with serious and persistent mental illness, among other conditions, consistent with the vision of health homes as a mechanism for improving coordination between general medical and mental health services. However, the four states have taken different approaches to designating the entities that can provide health home services and to paying providers, including managed care organizations.