Interestingly enough, we have just run into the same situation y’all are talking about.  We were tested at NIH (they send the tests to Cornell) and Dr. Merke has called for all of my daughter’s labs since day one because my husband nor I have an identifiable recessive or mutated gene.  I figure due to the relatively new aspect of DNA and genetics, there probably have been many CAH children with the same strains but they just have not been mapped.  I believe it is important for people to be genetically tested if they can because it might affect newborn screening.  As more types are identified, more things can be looked for in others.  Just a thought.