Djw, I know Costco doesn’t work with insurance companies on hearing aids; it’s up to the beneficiary to handle all the paperwork in terms of submitting claims. As MDB is indicating, some insurance plans will only cover certain aids from certain providers, which does not include Costco. If that is true for your policy, you may well come out ahead paying for Costco aids out-of-pocket and forgoing insurance coverage, rather than using the often-overpriced and subpar-quality aids you could get through insurance, if you can afford to do so.
Did you see this thread?