Incorrect Procedure Codes

My Father-In Law was at the Glynnwood hospital in Benoni for a hip replacement. His Medical aid has requested that they change the procedure codes as it is incorrect. As my Father-In Law is 80 years of age he looks at his statements on a daily basis hoping that the amount of R 96 831 has been paid, just to find out that it is still outstanding. The worry in his eyes of how he is going to pay this amount is not good for his health. Please Glynnwood hospital contact the medical aid and get this sorted!!