The Immigrant Access to Health and Human Services project describes the legal and policy contexts that affect immigrant access to health and human services. The study aims to describe federal, state, and local program eligibility provisions related to immigrants, major barriers to immigrants’ access to health and human services for which they are legally eligible, and innovative or promising practices that can help states manage their programs. This brief, drafted in late 2013, describes how the implementation of the Patient Protection and Affordable Care Act of 2010 (ACA) in California might affect immigrants’ access to health care in the state.