I know of at least one Canadian hospital that's incorporated ML into 100% of their ED triage. Sure it's not some state of the art deep learning architecture, but it's definitely a step above the old crop of heuristic-based systems you see so often in medical software. "Medical AI" is a stupid term that's been co-opted by more hucksters than legitimate practitioners, so I prefer to talk about more concrete (and less fanciful) applications like patient chart OCR or capacity forecasting.