eviCore Runs Prior Authorization Denials for Major US Insurers at Scale

eviCore operates as a delegated review layer between insurers and patients, handling prior authorization decisions for major carriers including Cigna, UnitedHealthcare, and Aetna. The ProPublica investigation documents how this structure concentrates denial volume in a single vendor, insulating insurers from direct accountability while limiting the throughput of physician appeals.

The mechanism matters for anyone building in health tech or insurance infrastructure. Prior authorization is a chokepoint: it gates whether a treatment proceeds, and who controls that gate determines outcomes at population scale. When a third-party vendor owns that function across multiple carriers simultaneously, the denial logic — whatever rules or models drive it — operates with minimal external visibility.

The investigation surfaces the "not medically necessary" designation as a repeated basis for denials, a classification that treating physicians dispute on a case-by-case basis but that is applied systematically at volume. That gap — between individual clinical judgment and batch-level administrative logic — is where patients lose coverage.

For engineers building claims tooling, prior auth automation, or appeals workflow software, the structure here is instructive. The current system depends on opacity: reviewers applying criteria at speed, with limited surface area for challenge. Any tooling that increases legibility — structured appeal generation, criteria cross-referencing, timeline tracking — addresses a real and documented friction point.

For founders in the health insurance or benefits space, the regulatory pressure on prior authorization is increasing. Federal rules requiring faster turnaround and more transparent denial reasoning are already in motion. Systems built on opaque batch denial logic face structural headwinds.

The full investigation is available at the ProPublica source. The picture it draws is not of bad actors at the margins but of a process architecture that produces denials as an output at scale.

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