Health Benefits Advisors. Room GH027 or GH028. Keesler Hospital. Phone: 376-4010 /376-4737/376-4752 (DSN: 591) Open 7 a.m.-5 p.m. Monday-Thursday and 7 a.m.-4 p.m. Friday. The health benefits advisors can assist you with any TRICARE question, TRICARE billing and claims processing. LINKS..