I have had the pleasure of visiting the OPD clinic a few times.
Regardless of the medical help that you may need you will need 3 things:
1. A number of appointment with you doctor (from the main reception) -> You should get it early in the morning 7:30 - 8:30 AM
2. Take your number to your designated office (Adnoc will go the Dental desk) and give them your Insurance Card. -> The office ladies will make a copy of your insurance and will give you a form to sign.
3. Take the insurance card and form to the cashier (reception or 1st floor), pay 50 AED -> Then wait until your name is called in the male/female area of your specialist.
I will mention that if you are doing a next-day follow up you are not required to pay.
So far, i have not encountered any problems besides the fact that my file was constantly being misplaced (due to repeated visits to several doctors in a short period of time).
Tell us your experience with OPD.
PS. if you are doing injections -> in the weekend you will need to go the Emergency entrance and the nurses (brothers & sisters) will do them for you.
PS#2. Always remember to bring your Insurance card.