> Only about 5% of denied in-network claims were turned down because the care was deemed not medically necessary. The rest were administrative, for an excluded service, for a missing referral or prior authorization, or for a reason the insurer never specified.
I worked in health tech for a while, and I can tell you the muck around a lot with ICD/CPT codes to maximize billing along with other shenanigans. There was actually a project at an innovation center at a well-known medical center which leveraged ML to maximize the amount of codes they could bill for without being rejected. The same kind of thing is often done by physicians who want to juice insurance.
Be mad--very mad--at hospitals and drug cos. As providers, they present themselves as patient advocates, but they're responsible for the outrageous healthcare costs. The dollar amount paid out by US insurance companies is maybe 2x that of other OECD countries, but the healthcare we get back from providers is trash (and extortive) by comparison.