I am a long time Costco HA client, and also have UHC. I think UHC benefits vary pretty widely between different plans, so you need to check carefully for how your coverage works.
In my case, I can get a $500 allowance if I use a provider from the UHC network. More interesting, when I reviewed with UHC provider (Connect Hearing) they offered different pricing from list price for UHC clients that was more attractive. So, from a total cost perspective, seems like you’ll need to find providers you might like and then get out-the-door quotes to really see cost status.
Also like others have said you need to look at other factors like trial period and warranty, etc. Connect Hearing offered me a 60 day trial, Costco is 6mos. Connect warranty is 2yrs, I think Costco is 3yrs?
60 day trial can work just fine for experienced HA users who have good idea of what they are looking for, but I think new users can find huge value from the extended trial at Costco to see how aids are working out for them.
Trial periods also let you check out providers, as a most important factor is how well you ‘click’ with specialist to get fitted - IMHO just as important as HA choice. With Costco, if you’re not happy with fitter than easy to switch to another at same location or even try different Costco location - your records follow you.
Good Luck … let us know how it works out for you!