The federal agency running No Surprises Act billing disputes just gave payers a new piece of paperwork to lean on, and it says something about who has been winning.
The Centers for Medicare and Medicaid Services, through its Center for Consumer Information and Insurance Oversight, published nine new Remittance Advice Remark Codes this month to supplement the existing dispute documentation payers and providers use during Independent Dispute Resolution, the arbitration process created to settle out of network billing fights without balance billing patients. The codes take effect August 6, 2026, and become mandatory for federal IDR submissions on January 1, 2027. They arrive alongside a broader reboot of the IDR system that CMS announced in May and a re-application process for arbitration entities announced July 10.
The timing is not neutral. Payers have complained for two years that IDR arbitrators rule in their favor far less than half the time. One health insurer told Wall Street analysts in July that providers win IDR disputes more than 80 percent of the time, with awards averaging 11 times the Medicare payment rate and, in some cases, as much as 30 times. Those multiples flow directly into what self funded employer health plans pay, since IDR outcomes set the going rate for disputed out of network claims.
The insight HR and benefits leaders should take from this is narrower than it looks. The new codes standardize how a denial or payment adjustment is explained, they do not change the arbitration formula or cap award multiples. That means employers should not expect claim costs to move by January because of this change alone. What they should expect is better visibility into why a given claim was contested, which is useful for benefits teams building 2027 trend assumptions or renegotiating stop loss coverage. The code fix follows a summer of federal activity aimed at how self funded plans handle disclosure, including a related proposal that would let group health plans drop paper mail for an estimated 155 million workers.
Source: CMS
