Some hospitals in Dumaguete are Tricare certified (e.g., Silliman). Did your partner receive medical care by a Tricare certified provider? If yes, he should be reimbursed (after factoring in deductibles & co-pays). If your partner did not get reimbursed in a timely manner did he email, or phone, Global24 to discuss his claims?
While not part of your post, when possible I receive my medical care at an "approved" Tricare medical facility (e.g., Makati Medical Center) because approved providers bill Tricare directly for payment. I still must pay my deductible & co-pays, but at least I do not have to fight with Tricare to get my money back!