Regence has been serving the Pacific Northwest/Mountain Region since 1917. With 3 million members, Regence reaches nearly 1,000 communities across Washington, Oregon, Idaho and Utah, making it the largest affiliation of health care plans in the Pacific Northwest/Mountain Region. Regence Blue Shield of Washington strives to innovate and advocate for improved care and costs, promote technology that improves service delivery, and drive public policy to remake the health care system.