That is indeed the case, though there's more to those numbers. Thos are numbers for prior authorization denials, but they're also from a report focused on Medicare Advantage plans for elderly and disabled folks (you know, the people who would be most fucked over by denials). Pulled from https://en.wikipedia.org/wiki/Brian_Thompson_(businessman)

The investigation revealed that in 2019, UHC's prior authorization denial rate was 8.7%. Thompson became CEO in 2021, and by 2022 the rate of denial had increased to 22.7%.

As an added bonus, there's also this insanity that he tried to push through:

In 2021, Thompson was criticized in an open letter from the American Hospital Association regarding a plan from UnitedHealthcare to start denying payment for what it deemed non-critical visits to hospital emergency rooms. UnitedHealthcare responded by delaying rollout of the change.

I wonder if UHC has ever denied coverage to victims of gunshot wounds?