Westover Tricare Service to close Published March 30, 2011 439 AWPA WESTOVER, Mass. -- The Westover Tricare Service Center will close April 1, 2011. Service members who need help or information can contact 1-877-Tricare or visit healthnetfederalservices.com. Tricare is closing 15 service centers in the northeast region with "very low use," according to its website.