When I had United Healthcare my doctor would often perform multiple routine services when I saw him. UHC denied every single claim, saying services performed weren't the purpose of the original appointment. They wouldn't just deny the claim for those services, they denied the claim for the entire visit and it happened almost every time I saw my doctor.
United Healthcare obviously didn't want me to make multiple visits for the same services because that would have cost much more. The crooks running the company were instead pocketing huge unearned profits because they knew few people would appeal their constant denials. Health Net served up other flavors of the same shit.
These companies need to be put out of business permanently.