Not legal, if you are covered by the Employment Act. As per legislation, employers are supposed to bear the FULL costs of the medical consultation fees. It is only the other costs (e.g. costs of medicine) that your company can avoid reimbursing. Reference can be found under my Page “Sources”: Medical Reimbursement
Thus, do have the doctor to provide a breakdown of your medical costs, as from my own experience, there are quite a few clinics which does not provide any breakdown.