Prior authorization is the most universally hated workflow in American medicine.
The AMA's 2024 Prior Authorization Survey is brutal: 94% of physicians report care delays from prior auth, 33% have seen it lead to a serious adverse event, 24% to hospitalization. Doctors spend roughly 16 hours every week — two clinical days — pushing paper for procedures and medications they have already determined their patients need.
Patients pay for it directly. Oncology delays kill people. Rural patients and Medicare Advantage seniors are hit hardest because the practices that serve them have the fewest billing staff. Insurers themselves don't want this — they're forced into it by their own utilization management vendors.
Greenlight absorbs the toil. The system reads the payer policy, finds the evidence in the chart, retrieves the supporting literature, drafts the appeal, and verifies every claim against its source — so doctors can spend their afternoons on patients instead of paperwork, and small practices can survive without administrative collapse.
Three things we won't compromise on.
Multi-agent, not a chatbot
Five specialist agents, each with one job: read policy, extract clinical evidence, retrieve literature, draft, verify. Each is independently composable on Agentverse.
Cited or it doesn't ship
Every factual claim in the letter must trace to a span in the chart, the policy, or a peer-reviewed citation. If the verifier can't ground a claim, the letter is held — never sent silently.
Built for the people doing the work
Doctors, medical assistants, and patients each see the same case from the angle that's useful to them. Permissions are explicit. Audit trail is the default.
Three views of the same case.
Doctors
Open the queue, see what's denied, send the appeal — or hand it back to your medical assistant with one click. Hours-saved counter on the dashboard.
Medical assistants
Drafts arrive pre-cited. Edit, mark ready for doctor review, move on. Every claim has a hover-to-source pointer; you can fact-check the whole letter in under a minute.
Patients
See the status of your appeal in plain language. No medical jargon dump, no surprise inbox messages — just where things stand and what's happening next.
Built at LA Hacks 2026 by Rishabh Chhabra, Aafreen Nazimuddin, and Ainesh Basu — University of Illinois Urbana-Champaign.
Catalyst for Care track. Multi-agent on Agentverse. MongoDB Atlas Vector Search for the literature retriever. Built with Claude Code throughout.