What is the CARC/RARC requirement in the 2026 Federal IDR Operations rule?
Verdict Consulting Group Research · Updated
Answer
The 2026 Federal IDR Operations rule requires plans and issuers to use specified claim adjustment reason codes (CARCs) and remittance advice remark codes (RARCs) on remittance advice to out-of-network providers, showing whether a claim is subject to surprise-billing protections and federal IDR. Under July 17, 2026 guidance, it applies to services furnished from January 1, 2027.
Detail
The requirement at a glance
| Item | Detail |
|---|---|
| Who | Group health plans and health insurance issuers (and FEHB carriers) |
| When it applies | Any paper or electronic remittance advice to an entity with no contractual relationship with the plan or issuer |
| What it conveys | Whether the item or service is subject to the No Surprises Act surprise-billing and federal IDR provisions |
| Codes | RARCs specified in guidance issued July 17, 2026; plans may continue to use the CARC they deem most appropriate |
| Applicability | Items and services furnished on or after January 1, 2027 |
Why the Departments adopted it
The preamble to 91 FR 33900 explains that clearer remittance information is meant to help providers identify early whether a claim can go to federal IDR, and so reduce ineligible dispute submissions. The rule took effect August 3, 2026, but plans are not required to use the codes until the applicability date set in guidance.
CMS's guide notes the Departments may specify particular CARCs in future guidance.
Read the analysis
Sources
- Federal Register — Federal Independent Dispute Resolution Operations, 91 FR 33900 ()
- Centers for Medicare & Medicaid Services — Federal IDR Operations Final Rules Implementation Timeline Guide ()
General information only, not legal advice. Verdict Consulting Group is not a law firm.