My daughter had very advanced bone age when she was younger. Her doctor added Florinef to her daily meds - even though she is not a salt-waster. It really helped. At that time she was also tested for precocious puberty and the tests were inconclusive. Two years later she showed elevated hormones and we started depot-Lupron (it's a monthly injection). Either CAH or precocious puberty can accelerate the bone age. These are just some suggestions you might want to take to the doctor. Good luck