> and a specifically trained LLM

Expert system. You want an expert system. For example, a database mapping "what patients write" to "what patients need to hear", a fuzzy search tool with properly-chosen thresholding, and a conversational interface (repeats back to you, paraphrased – i.e., the match target –, and if you say "yes", provides the advice).

We've had the tech to do this for years. Maybe nobody had the idea, maybe they tried it and it didn't work, but training an LLM to even approach competence at this task would be way more effort than just making an expert system, and wouldn't work as well.