I think It was itemized but they have different rates they charge individuals vs. they charge insurance, IDK it was a busy period and I didn't think about appealing prices of individual items, I didn't even know I could negotiate like that. I'm not American born, that was the first time I dealt w/ American healthcare. I'd likely do that now in a similar scenario.
Further introducing business managers on your side unlikely is the optimal answer overall. I recently heard in a podcast, for every $1 you spend on healthcare, only 55 cents of is actually used for caring your health or something.