The Washington Coverage Agreement is an agreement between the State of Washington and private health insurance carriers in the state. It was created to ensure that all Washington residents have access to necessary health care services. The agreement guarantees that all insurance carriers in the state will cover certain services, such as emergency care, primary care, and inpatient and outpatient hospital care. It also mandates that carriers provide coverage for mental health and substance abuse services, as well as preventive care services. The agreement also requires carriers to cover medically necessary services provided by out-of-network providers. There are two types of Washington Coverage Agreement: the Basic Agreement and the Enhanced Agreement. The Basic Agreement outlines the minimum requirements for coverage, while the Enhanced Agreement includes additional services and benefits. Both agreements guarantee coverage for a range of treatments and services, including prescription drugs, vision care, and long-term care services. The Enhanced Agreement also requires carriers to provide coverage for certain treatments and services for certain conditions, such as cancer, AIDS, and mental health conditions.