Counsyl definitely falls under the scope of HIPAA; we do tests at the request of physicians, so we're like any other lab as far as privacy is concerned. Your employer, parents, or prospective mate would only know about the results if you decide to tell them.
It's also important to note exactly what Counsyl is testing: we're look at severe single-gene disorders, things that in most cases cause severe disability or early death. Importantly, if you only have one defective copy of a gene for which we test, you won't show symptoms of the disease. This is not the kind of thing that should affect your employer or insurer. And, if you're a carrier, it's probably something you should discuss with your prospective mate: if he or she is also a carrier for the same disease, there's a 1/4 chance of your child having that severe condition.
*edit to add the last paragraph