This is one of the areas where more standardization would certainly help. If there were more standardization of which codes disallow which other ones (which can currently vary wildly by plan even with the same insurer, must less across insurers), then a lot of line items could actually get removed as truly redundant, vastly simplifying the bill.
Yep. Hospital "bills" are a fiction. On one occasion I was presented with an "Explanation of Benefits" for a hospital stay where I was "charged" for being in two hospital rooms at the same time. As if that weren't enough I was also "charged" with having a "Pap smear"[0], even though I don't have a cervix.
I complained bitterly and after making a big stink was informed by the hospital my insurer that the items weren't actually "billed". Rather, the insurance company paid $1500/day regardless of the treatment provided.
It's disgusting!
A Pap smear[0] is a diagnostic test to detect (pre)cancerous cells on one's cervix[1].
I would be able to dispute a double room billing, but I was sedated and dying so I took whatever they offered, assuming good faith.