Don't you have a subscriber card? Is it possible that you can get this information from the website of the insurance company?
See this discussion. It has not aged well, but it might provide some insight.
I do but it only has my own member id and not much else, their website has no way to retrieve the information that ive seen and theres no option on turbotax to say i havent received a 1099-hc form so im at a loss
Then I guess you can file an extension, and work on this problem next week.
Call whatever insurance company you have and ask them for a copy of the 1099-HC.