Texas Government Code - GOV'T § 660.010. Travel Expenses Incurred to Obtain Medical Care

(1) the expense is incurred outside the employee's designated headquarters;

(2) the purpose of the employee traveling outside the employee's designated headquarters was to conduct official state business;

(3) waiting to receive the care until the employee returns to the employee's designated headquarters would be unreasonable;  and

(4) the expense is paid or reimbursed only to the extent it would have been paid or reimbursed had it been incurred while conducting official state business.