Most newborn screening programs set their cutoffs at pretty high levels, in order not to saturate the system with false positives. If this child had a positive newborn screen, there is a reason for it....especially if the child was neither premature, nor of low birth weight.   

 

By now, it should be pretty clear whether there is still reason to think that this child has CAH.  If the baby does not have CAH, his 17-ohp should be completely normal by now, meaning that itshould be under 200 ng/dl, no matter what time of day the test is taken. However, If the 17-ohp is still clearly elevated above that mark, then I think there is still reason to be concerned.  In that case, three months is not too young to have an ACTH stim test. 

 

Something like this should be simple enough for the endo to "prove" or explain...all he’s got to do is pull out the lab results.  If he’s unable or unwilling to explain the results in concrete terms, (rather than using wishy washy statements like, "He looks fine") I would request all the baby’s medical records and get another opinion.  There is really no reason to waste any more time going around in circles with this guy.