A sad case, but blaming the insurance company is stupid. They have to have some criteria to determine what is covered and what is not, right? Requiring that it be FDA approved is one of the criteria. In this case, on appeal/review, they will probably still cover the costs. UHC would not solve this issue, they too would have to set some standard somehow as to what is or is not covered.
Even if UHC would 'fix' this issue, a system that is better for those weird situations but worse overall for the majority of patients is still a bad thing.