Not sure if you are familiar with payor systems or not, but an EMR/EHR basically gathers all the information sent to a payor system and prepares it in the format the payor wants.

A good EMR/EHR does the same thing with referrals and authorisations, and bigger hospitals will have direct real time links to insurers to approve those referrals. Most of them happen instantly. The ones that aren’t require manual review from a medical practitioner who workers for the insurer.

I do not understand how a cobbled-together LLM based system will do this better than the existing EMRs.