Short answer. Batching is combining multiple disputed line items into a single federal IDR dispute. Under the 2026 final rule, items may be batched when they involve the same payer and the same or related service codes on consecutive days, capped at 50 line items per dispute. One entity fee covers the whole batch, which is what makes lower-dollar claims economic to dispute.
What batching is
Batching lets multiple items and services travel as one federal IDR dispute, with one certified IDR entity fee spread across the whole batch instead of paid per claim. For emergency medicine, radiology, pathology and anesthesia — high volume, modest per-claim dollars — batching is usually the difference between a filing program that pays for itself and one that doesn't.
When claims can be batched
- Same plan or issuer, and the same certified IDR entity.
- Items and services billed under the same service code, or a comparable code under a different code set.
- Items and services furnished to a single patient on consecutive days — added by the 2026 final rule.
- All claims in the batch must independently satisfy the timing rules; batching doesn't rescue a late claim.
The cap: 50 items and services per batched dispute. Regulators set the ceiling to keep arbitrator workloads manageable. Build batches to the cap where the economics justify it, and don't assume a rejected oversized batch can be refiled — the initiation window may have closed.
The economics, briefly
- Administrative fee: $15 per party per dispute since the 2026 rule, down from $115.
- Certified IDR entity fees are set within federally published ranges and are higher for batched disputes than single ones — but far lower per claim.
- The losing party pays the IDR entity fee, which is why win rate and batch construction matter more than filing volume.
How batches lose
- Mixed service codes that don't qualify as comparable.
- Claims from different plans swept into one dispute.
- One ineligible claim contaminating an otherwise clean batch.
- Batches assembled by billing date rather than by the rules — the most common error we see when we take over a book from an in-house team.