I recently bought life insurance and I'm pretty sure they didn't even bother to ask my primary care doctor for her records (though they had the right to), and they certainly didn't ask me about any tests I may have done on my own. (I think they did obtain at least some of my Rx history though. I assume from CVS Caremark.)
Right now I think there's kinda the opposite problem with Long Term Care insurance where people who take a genetic test that shows high risk for e.g. Alzheimer's run out and buy LTC insurance which messes up the risk pool.