Denials Are Rising Across Health Systems — and the Hardest Ones to Fix Are the Ones Nobody Can See

The direction of travel on hospital denials is no longer ambiguous. Kodiak Solutions' analysis of roughly 2,300 hospitals and 350,000 physicians found the average initial denial rate rose to 11.6% in 2025 from 11.4% in 2024, the median final denial rate climbed from 2.5% to 2.7%, and net revenue leakage jumped 25% year over year — with the hospitals in that dataset collectively missing $48.4 billion in 2025, up from $38.6 billion the year before (TechTarget, reporting on Kodiak Solutions).

The increase is concentrated in clinical denials, not clerical ones

The clinical denial rate — the category that includes prior authorization failures and medical necessity determinations — rose from 2.4% to 2.6%, and denials involving a payer request for information went from 3.4% to 3.6% (TechTarget, reporting on Kodiak Solutions). That matters for how a system responds. Clerical denials get solved with cleaner claim scrubbing. Clinical denials get solved with authorization workflows, documentation standards, and payer-specific appeal strategy — a fundamentally different operational investment, aimed at a different part of the organization.

At system scale, the denial rate is the least useful number in the report

A single system-wide denial percentage tells leadership almost nothing actionable, because it averages across departments that have genuinely different problems. Cardiology's denials and behavioral health's denials don't share a root cause, don't share a payer dynamic, and don't share a fix. A system reporting 11% aggregate might have one service line at 6% and another at 22% — and the aggregate number actively hides that.

The expensive failure is the pattern that repeats in five places at once

When each department or facility runs its own billing processes and reviews its own denials, the same correctable issue — one payer's authorization requirement that changed, one documentation element that stopped satisfying medical necessity review — can exist simultaneously across five departments without anyone recognizing it as one problem. Each department writes off its share as ordinary friction. Nobody sees the aggregate, so nobody escalates it, and a fix that would have taken one conversation with one payer instead costs the system months of leaked revenue across every place it's quietly happening.

Consolidated visibility is the prerequisite, not the deliverable

Rolling denial data up into a single reporting layer segmented by payer, service line, facility, and denial reason isn't the endpoint — it's what makes the actual work possible. It's what turns "our denial rate is up" into "these three payers changed authorization requirements in Q2, it's hitting four departments, and here's the appeal argument that's working." Without that layer, a system is responding to denials one claim at a time in a year when the industry data says the volume of them is rising.

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Industry statistics cited above are drawn from Kodiak Solutions' "State of the healthcare revenue cycle" report as reported by TechTarget and are not medbpo360's own client data.