CMS-9897-F mechanics: a neutral explainer of the June 2026 Final Rule

CMS-9897-F, the 2026 IDR Operations Final Rule, reduces the administrative fee to $15 per party per dispute (effective June 11, 2026), sets a general effective date of August 3, 2026, and limits batched determinations to 50 qualified IDR items and services. It adds a 5 business day eligibility review, mandates payer registration and a phased IDR Gateway, requires CARC/RARC codes on remittances, and shortens the cooling-off period from 90 to 30 days.

Alongside the $15 administrative fee, 2026 certified IDR entity fees run roughly $425 to $800 for single determinations and $625 to $1,150 for batched determinations. The administrative fee and the certified IDR entity fee are distinct; the rule changed the former sharply while the latter continues to vary by entity and determination type.

The rule is best understood alongside the CMS Public Use Files, which document dispute volumes, ineligibility rates, and determination outcomes. Those files are independently verifiable; vendor and trade-association characterizations of the rule's impact are not, and should be read as interested-party positions.