Federal IDR Batching Rules: November 2026 Changes

Use the correct transition date

The new batching framework applies to open negotiation periods beginning on or after November 1, 2026. Those batches are capped at 50 line items. Earlier open negotiations remain under the preceding framework; do not apply the new criteria retroactively.

CMS batching implementation notices

Which services can be grouped under the new rules?

The final rule allows three organizing approaches: a single patient encounter on the same or consecutive service dates and the same claim form; the same service code or a comparable code across coding systems; or specified Category I CPT groupings for anesthesiology, radiology, pathology and laboratory services.

The specialty grouping is not a blanket permission to batch every code in every CPT section. Check the current guidance for the permitted ranges and confirm all other party, provider, timing and eligibility conditions.

CMS final rule: batching provisions

Keep the cooling-off clocks separate

For affected new batches, the cooling-off period is 30 business days, with a four-business-day subsequent initiation window. Earlier batches, single disputes and bundled disputes retain a 90-calendar-day cooling-off period and the applicable 30-business-day subsequent window.

CMS October 2, 2026 implementation notice

A batch is different from a bundle

A batch groups eligible line items for separate payment determinations in one dispute. A bundled payment arrangement concerns items or services represented by a bundled payment structure. A payer placing several claim lines on one remittance does not, on its own, tell you which submission category to choose.

Document the billing and initial-payment structure, then apply the current CMS definition. Do not use a bundled label merely to avoid a line limit or an entity fee tier.

CMS batching and bundling guidance

Audit a proposed batch before filing

Build a line-level worksheet with each claim’s legal parties, provider identifiers, service code, encounter, date of service, receipt date, open negotiation period and routing evidence. Flag any row that does not satisfy the proposed organizing rule.

For example, several Choice Plus claims may share a network but involve different self-funded employers. Check the actual plan and legal counterparty rather than assuming the UnitedHealthcare logo makes every claim batch-compatible.

• Check eligibility for every line.
• Verify parties and provider identifiers under the applicable rule.
• Document the permitted grouping and service-date window.
• Confirm negotiation dates, cooling-off history and filing deadline.
• Compare the entity’s batch and additional-line fees.
• Preserve the submission crosswalk and correct any rejected grouping promptly.