Hospitals don’t get paid for “how hard the surgery was.” They get paid for how sick the paperwork says the patient was.
Same bowel surgery. Same nurses. Same stay. Then someone adds anemia or diabetes as a secondary diagnosis on the chart, and the insurer’s computer bumps the whole stay into a higher-paying bucket. More money. Often the same care.
AI’s contribution is mostly hunting those bump codes, cheaply, overnight, from lab values and notes humans used to miss. BCBS puts most of the extra ~$1B on that secondary-diagnosis trick, not on patients getting sicker. (Their anemia example: more diagnoses, not more transfusions.)