About one in seven treatment requests was denied last year.

Before a health plan will cover certain treatments, a doctor has to get it approved first. That is prior authorization, and for the first time plans are now required to publish how often they say yes and how often they say no.

Crossfoot collects those filings — 536 of them, from 96 insurers across 49 states — and puts them in one place, where they add up to a 13.6% denial rate. Every figure came from the plan's own document, and every one has been checked against itself. Some of them do not add up.