The University of Washington Academic Medical Center has signed a participation agreement with First Choice Health Network, Inc., to improve access to health care for thousands of Washington residents.

More than one million First Choice Health members -- roughly one sixth of the state's citizens -- can obtain health care through the UW's network of primary-care neighborhood clinics, as well as through Harborview Medical Center and UW Medical Center.

The participation agreement became effective Jan. 1. It is structurally similar to agreements with other entities that participate in First Choice, including Stevens Memorial Hospital, Evergreen Hospital and Valley Medical Center.

First Choice Health Network, Inc., is the largest preferred provider organization in Washington state. Its mission is to provide patient-centered health care. First Choice Health is owned by doctors and hospitals located throughout Washington state.