Behavioral health denial statistics 2026

Is there a national denial rate for behavioral health?

No neutral, nationally representative one that we could find. Insurers' public reports do not break denials out by service type, and the new prior-authorization metrics are posted as plan-wide percentages. Behavioral-health denial rates of 15 to 20 percent, often repeated on vendor sites, have no traceable source.

KFF's analysis of 2024 Marketplace data notes that insurers do not report what types of services were denied; CMS collects medical-necessity denials reported separately for behavioral health but KFF does not publish that split, and separate behavioral-health claim reporting begins with plan year 2027 (KFF, Mar. 24, 2026). The prior-authorization metrics insurers began posting in 2026 likewise cannot be broken down by service (KFF, Aug. 13, 2026).

What does exist are state and single-insurer figures, listed in the tables below. They describe one state or one plan and should be cited that way, not as a national rate.

How often are claims denied and appealed?

On HealthCare.gov plans, insurers denied 19% of in-network claims in 2024, ranging from 3% to 36% by insurer, and fewer than 1% of denials were appealed. Industry surveys add context but not rates: they are self-reported, not behavioral-health specific, and labelled here as vendor or association figures.

How often are prior-authorization requests denied?

In the first public metrics required by CMS, insurers denied 12% of standard prior-authorization requests in Medicare Advantage, 14% in Medicaid managed care and 18% in HealthCare.gov plans for 2025. Of denials that were appealed, 67%, 47% and 43% respectively were overturned. Behavioral-health-specific prior-authorization data come only from audits and single-state filings.

How often do appeals of behavioral-health denials succeed?

When they reach an independent reviewer, often. In New York's external appeals from 2019 to 2025, reviewers overturned 61.5% of substance use denials and 60.6% of mental health denials, against 46.7% across all categories. California's independent medical reviews overturned 56.3% of plan decisions in 2025, across all conditions.

What have regulators found when they audit behavioral-health denials?

Procedural failures and blind spots. HHS-OIG found that none of 100 sampled prior-authorization denials at Philadelphia's Medicaid behavioral-health plan met all requirements, and GAO found that 8 of 9 Medicare Advantage organizations it reviewed required prior authorization for behavioral health while CMS audits had not targeted it.

On the Pennsylvania counts: 711 denials in nine months of 2024 is 82% more than the 391 in all of 2023. A provider association summary described the change as a 45% increase, which is the same difference divided by the 2024 count. We cite the state's counts directly.

What is the status of mental health parity enforcement in 2026?

The Departments are not enforcing the new parts of the 2024 parity rule, have told a federal court they will propose a replacement, and now expect to send the draft for White House review by December 18, 2026. The parity statute, the 2013 rule and the 2021 duty to perform comparative analyses still apply.

• May 15, 2025: the Departments announced they would not enforce the provisions new in the 2024 final rule while litigation continues, plus 18 months (DOL statement).
• March 30, 2026: in ERISA Industry Committee v. HHS, the Departments told the court they would not defend the 2024 rule and would issue a new proposed rule by December 31, 2026 (joint status reports).
• September 8, 2026: EBSA's Field Assistance Bulletin 2026-03 set enforcement priorities: separate treatment limitations, medical-necessity standards and review (prior, concurrent and retrospective), and network adequacy (FAB 2026-03).
• September 30, 2026: a further status report said the draft proposal would go to the Office of Information and Regulatory Affairs by December 18, 2026, with review of up to 90 days, so publication may slip into 2027 (joint status reports).

Which commonly repeated figures should you avoid?

Avoid any national behavioral-health denial rate, an “average denial rate near 12%” that appears in sponsored content without a source, an overturn rate inferred from KFF's upheld share, and the “fewer than 1 in 10,000 request external review” figure unless you attribute it to ProPublica, which did not name its source.

• “Denial rates averaged near 12% in 2025”: stated in sponsored HFMA content with no cited source.
• A behavioral-health denial rate of 5 to 20 percent: repeated on vendor sites without a traceable dataset.
• “34% of Marketplace appeals were overturned”: KFF reports that 66% were upheld; the rest may include pending or withdrawn appeals.
• “Fewer than 1 in 10,000 eligible people request external review”: reported by ProPublica, Sept. 10, 2025 from a report it did not name.

How was this page compiled, and how often is it updated?

Every figure was checked against its source on October 14, 2026. Where a publisher blocked automated access, the same document was read from an archived copy of the identical URL. The page is re-verified quarterly and whenever a cited source publishes new data, under our editorial policy.

Sources are ranked as government, peer-reviewed, independent nonprofit, association or vendor. Vendor and association surveys are kept because readers ask about them, but they are labelled and never presented as rates for behavioral health. ClaimParrot publishes no denial or overturn figures of its own. Corrections and new sources are welcome; the editorial policy explains how to send them.