Review of United Diagnostic Laboratory Inc

i went to your laboratory office in taft avenue for ct scan with contract whole abdomen.This is my routine examination and did not ask for any referral from doctor. I presented my senior ID card but it was not honored by your cashier because i do not have a referral from my doctor. I did not argue with your cashier because do not want to be stress and I want to be relax during the procedure, so i paid P8,400.00, full payment without senior discount. Is this really your policy? If this is your policy, may I ask what is the relation of the doctotr's referral to the law on discounts for senior citizen? Please enlighten me on what regulation do you base your action. Why is it that in other laboratory clinics they honor the senior IDs even without doctors' referral. I need your response on this matter