Aetna in Federal IDR Disputes
Aetna appears as the non-initiating party in 185,954 disputes. Self-funded plans dominate its profile at 75%, with fully insured plans a smaller share at 6%.
What CMS Reports
| Plan type | Disputes | Share | Which process it points to |
|---|---|---|---|
| Self-funded or partly self-funded employer plan | 138,739 | 75% | Federal — ERISA preempts state regulation |
| Fully insured group plan | 10,680 | 6% | A state process may apply |
| Individual market | 4,059 | 2% | Depends on the state |
| Federal Employees Health Benefits carrier | 4,052 | 2% | Federal |
| Non-federal government plan (state or local) | 26,741 | 14% | Depends on the state — not an ERISA plan |
| Church plan | 3 | 0% | Depends on the state — not an ERISA plan |
| No issuer response | 1,680 | 1% | Plan type not established |
| All plan types | 185,954 | 100% |
Source: CMS, Federal IDR Supplemental Tables, Q3 and Q4 2025, Table 9 — “Top 10 Non-Initiating Parties”. “Non-initiating party” is the Departments' own term for the party a dispute is brought against; it carries no finding about conduct, and the counts measure volume of disputes rather than anything else. CMS publishes these tables here.
Federal Process or State Process
The 75% self-funded share means most Aetna disputes proceed under the federal IDR process regardless of state law, because ERISA bars state regulation of self-funded employer plans. The 6% fully insured share is comparatively small, so state-route options apply to a narrower set of claims. State and local government plans account for 14%, which ERISA does not reach. Disputes with no plan response total 1,680, or 1% of Aetna's volume.
Why this decides so much: filing into the wrong process ends the dispute on eligibility rather than on the merits. Of the 1,449,900 disputes closed nationally in the second half of 2025, 271,399 — about 19% — were closed as ineligible, and the non-initiating party challenged eligibility in 574,128 of the 1,372,563 disputes initiated. What eligibility turns on.
Before you file against Aetna
- Determine the plan type from the EOB or plan documents before filing, given the 75% self-funded share.
- For the 6% fully insured cases, check whether your state has a surprise-billing law that provides an alternative route.
- Confirm the plan-type documentation is complete to avoid the no-response situation reflected in 1,680 disputes.
What the Federal Medians Say Your Claims Are Worth
Volume tells you who is in the room. What a decided dispute is worth depends on the service and the size of the claim, not on the payer: CMS reports the median prevailing offer at 5.22× the plan's own qualifying payment amount on claims under $100, falling to 1.69× at $10,000 and above, and it varies by specialty from 2.00× to 25.85×.
The medians for your specialty · The full federal dataset · What this costs