Sign On| Kaiser Permanente Kaiser Permanente health plans around the country: ... Rockville, MD 20852 • Kaiser Foundation Health Plan of the Northwest, 500 NE Multnomah St., Suite 100, Portland, OR 97232 • Kaiser Foundation Health Plan of Washington or Kaiser Foundation Health Plan of Washington Options, Inc., 1300 SW 27 th St., Renton, WA 98057 ...