Iritis,not oritis. Bad autofill! Grrrrr!.....
I don't know what a CPK is,but I suspect that hip pain is one of the first symptoms of A.S.,as it was,in My case,good luck. P.S.,You'll come down with a bad case of otitis,swelling and red eye pain,that Your body is trying to compensate for the inflammation condition of said disease,as it has effected Myself.
I am glad you are going in for a follow up. A high CPK could mean a lot of different things but needs to be investigated by a doctor.