Find a Provider Click on the link for your PPO to find a participating physician or facility.   Highlands Wellmont Health Network PHP Signature Health PHCS BeechStreet American PPO Multiplan HealthSmart One Net PPO Initial Group USA Managed Care Medcost First Health / American Health Alliance PPO Next PPOM Interplan USA Managed Care - Washington County Employees   Privacy Statement   Terms of Use Corporate Systems Administration, Inc. 4722 Lake Park Drive PO Box 4985 Johnson City, Tennessee 37602-4985 voice: 423.282.3420