Ok go to Medical Council along Athumama Stadium road before the Fly Over bridge with your wifes visa,they will give you a medical clearance perper stamped and signed...then you take it to immigration in Gharafa Area behind R&B Boutique..with 2 passport copies,take your number and make a complain they will receive the medical papers from you and you pay 1200 riyals they will print out the ID for u in 10mins....medial dont give ID only immigration will give you the ID after going through your medical papers...thanks