$942 million in additional hospital costs attributed to IA-assisted medical coding

The Blue Cross Blue Shield association blames this deviation on secondary diagnoses charged more often, without corresponding treatment. Hospitals dispute this reading.

The Blue Cross Blue Shield Association (BCBSA) accounts for $942 million of the additional expenses recorded by its plans between 2024 and 2025, compared to a baseline set in 2023, for comparable coverage. Approximately $653 million comes from secondary diagnoses charged more frequently than before.

The analysis links this increase in "coding intensity" to the dissemination of AI tools in clinical literature. By overlapping admissions for major intestinal surgery with treatments actually administered, between the first quarter of 2023 and the fourth quarter of 2025, it increased by 55% in partial obstruction diagnoses and 33% in excess acidity diagnoses, without a comparable increase in associated care.

For a spokesperson for the association, the gap between diagnosis and treatment suggests that AI identifies more billing conditions rather than more severely affected patients. Hospitals reject this interpretation: they advance an older and more fragile admitted population, and documentation simply becomes more complete where conditions passed previously unnoticed.