> The UnitedHealthcare example in this article is interesting in that is was being used in production. OTOH, it sounds much more like something evaluating business rules or some heuristics rather than an LLM or even an ML based solution.

I'm fairly certain that at least one insurance company VP out there is using the LLM/ML hype to trumpet what is actually a statistical model evaluation. OTOH if it provides cost savings does the business truly care what it is? Especially if they can spin it as 'The computer makes more informed decisions thanks to AI'.