Batching: When Small Claims Became Worth Filing

The counterintuitive finding

CMS publishes the median prevailing offer as a percentage of the plan's qualifying payment amount, broken out by claim size. Here is the full table for the fourth quarter of 2024.

The gap between what the plan calculated and what an independent entity found defensible is widest on the smallest claims and narrowest on the largest. A claim with a QPA under $100 closed a median gap of 5.53×; a claim at $10,000 or above closed 1.73×.

That is a statement about proportion, not about dollars. 1.73× on a $12,000 QPA is more money than 5.53× on an $80 one. But it means the small claims are not the marginal ones in percentage terms — they are the ones where the plan's benchmark sits furthest from defensible.

Why they were still not worth filing — until June 2026

Because of the fee. At $115 per party per dispute, a claim with an $80 QPA was not worth disputing under any multiple. Even at 5.53×, the gap recovered would have been roughly $362 against a non-refundable $115 to file. The arithmetic said no, and practices were right to say no.

Under the Federal IDR Operations final rules, the administrative fee dropped to $15 per party per dispute for disputes initiated on or after 11 June 2026 — an 87% reduction. The same claim now costs $15 to put in front of an arbiter. The arithmetic reversed for an entire population of claims that practices had correctly learned to ignore.

What batching does on top of that

Batched disputes let qualifying claims be submitted together as a single dispute. That means one administrative fee and one certified IDR entity fee covering many line items rather than each.

Consider a radiology group with 200 out-of-network reads a month averaging a $180 QPA. Filed individually at $15 each, the fees alone are $3,000 a month. Batched into disputes of, say, twenty qualifying claims, the same volume is ten disputes and $150. The claims did not change; the cost of asking did.

This is why the CMS tables show federal IDR dominated by parties who file at scale: the top ten initiating parties accounted for roughly 71% of all disputes initiated in the second half of 2024. It is not that large filers win more. It is that batching and process knowledge are what make individual claims economic to dispute at all.

Where batching goes wrong

Batched claims must involve the same or similar items and services, the same plan or issuer, and fall within a defined period. Those requirements are not decorative. A batch assembled loosely invites an eligibility challenge against the whole batch rather than against the one claim that did not belong — and eligibility challenges were raised in 41% to 43% of disputes in the second half of 2024.

The failure mode is specific and worth naming: a practice discovers batching, sees the fee arithmetic, batches aggressively, and converts a set of individually viable claims into one contested batch. Roughly 19% of disputes initiated in 2024 were found ineligible. Over-batching is a reliable way to join that population.

The order to work in

1. Eligibility first, always. A batch of ineligible claims is one wasted fee instead of twenty, which is not the saving it sounds like — the claims are still gone.
2. Group by plan and by service type, not by convenience or by date received.
3. Check the calendar per claim. Batching does not extend anyone's deadline. Each claim still has its own 30-business-day negotiation period and its own four-business-day window to initiate.
4. Then run the fee arithmetic, which at $15 per party clears far more often than it used to.

The claims most practices have already written off are, by the published medians, the ones the fee change most affected. A review of what you wrote off costs nothing.

The Fee That Actually Decides the Economics: the Certified Entity Fee

Practices that discovered the $15 administrative fee often stop their arithmetic there. That is the smaller number. The fee that dominates the process is the certified IDR entity fee, and unlike the administrative fee, it is paid by the losing side.

The Departments publish the entity fee range annually, and it is set differently for single disputes and batched ones. For a sense of scale: in the second half of 2024 alone, certified IDR entities were paid $381,129,603 in fees, against $105,289,480 collected in administrative fees. Entity compensation ran 3.6 times the administrative fees. When you model a batch, the entity fee schedule for batched disputes — not the $15 filing fee — is the line item to look up before you decide what to file.

What makes this tractable is that the fee risk is two-sided. Of the 698,968 payment determinations in the second half of 2024, providers, facilities and air ambulances won 596,789 (85.4%); plans and issuers won 101,639 (14.5%). When the provider prevails, the plan pays the entity fee. The exposure runs the other way when the plan prevails. Split decisions are a rounding error in this process: 538 out of 698,968 determinations, or 0.08%. The arbiter selects one of the two offers — that is the mechanic you are planning around.

Two things to do with this before filing anything:

• Pull the currently published fee schedule for batched disputes and run your batch arithmetic with the entity fee on the loss side, not just the $15 on the filing side.
• Check whether your batch's offers are supported by the kinds of information entities weigh (covered in the section below). The fee risk is a function of the strength of the documentation you attach, not of the filing itself.

The administrative fee remains non-refundable regardless of outcome, at $15 per party for disputes initiated on or after 11 June 2026. That is a sunk cost at filing. The entity fee is not — it is the reason the offer you submit deserves the same preparation a larger single claim would get.

Who Actually Files Federal IDR — and at What Practice Size

A group administrator looking at hundreds of small underpayments often assumes this process belongs to large revenue-cycle shops. The filed-dispute data for the second half of 2024 says otherwise, and it is worth reading before deciding your practice is too small to participate.

First, whose tool this is. Of 853,374 disputes initiated in the second half of 2024, physicians and practices initiated 745,781 and facilities 107,473. Plans and issuers initiated 120 — about 0.014% of filings. Federal arbitration is, in the published data, essentially a provider-side instrument. The counterparty you face in this process is not a plan that files its own disputes; it is a plan responding to yours.

Second, who files at volume. The Departments break initiating parties down by staff size:

The largest single known category is practices with 20 to 50 staff. They filed more disputes in that half-year than groups with more than 500 staff filed — roughly three times as many. Groups of that size are the middle of the distribution here, not an outlier squeezing in at the margins.

What this changes practically: the barrier to filing small claims at volume has not been practice size. It has been unit economics — the per-dispute cost of preparing and filing each claim — which is what batching and the reduced administrative fee address. If you run a 30-person group with a stack of small out-of-network shortfalls, the published data places you in the most common filer profile in the process, not below the threshold where filing makes sense.

One caveat on reading this table: size is unknown for 224,490 filings, so treat the distribution as directional, not exact. It still shows mid-size practices operating at comparable or greater volume than the largest groups.

Batching Is Young Law: Read the Current Rules Before You File

The batched-dispute share of this process roughly doubled in six months: batched disputes accounted for about 27% of determinations in the second half of 2024 (188,045) versus 15% in the first half. That growth happened fast, and the reason it happened fast is tied to litigation that every batcher should know about before assuming the rules are settled.

On 3 August 2023, the U.S. District Court for the Eastern District of Texas, in Tex. Med. Ass'n v. HHS (No. 6:23-cv-59-JDK, "TMA IV"), vacated the batching provisions of 45 CFR 149.510(c)(3)(i)(C) and vacated the $350 per-side administrative fee that had been set in guidance dated 23 December 2022. In a related decision on 24 August 2023 (No. 6:22-cv-450-JDK, "TMA III"), the same court vacated portions of 45 CFR 149.130 and 149.140.

The practical consequence was visible in the throughput numbers. Issuance of determinations was paused from 6 February to 17 March 2023 (after TMA II), and again from 4 August to 21 September 2023 for single disputes and until 15 December 2023 for batched disputes. That is why the 2023 determination count (209,346) is understated: decisions simply were not being issued for parts of the year. When you see the figure that 2024 produced 1,047,575 determinations — roughly 500% more than 2023 — read it together with those pauses, or it will mislead you about underlying growth.

What this means for someone building a batching operation:

• The text of the batching regulation that was vacated in TMA IV is not the law to rely on. Before assembling a batch, check the Departments' current Federal IDR process guidance for the operative batching requirements in effect at your filing date, rather than working from a summary — including this one.
• Batching requirements have changed within the short life of this process, and half-year shares moved from 15% to 27% of determinations in a single half-year. Re-verify the rule set each time you file, not once when you build the workflow.
• The volume of batched determinations in the published data (188,045 in one half-year) indicates entities are processing batches at scale — the mechanism is not experimental. The requirements around it are what move.

Sorting by Plan Type Before Sorting by Dollars

When a group has hundreds of small underpayments, the instinct is to triage by dollar amount. The published filing data suggests adding a second sort key earlier in the workflow: plan type. Where a claim sits in the plan-type distribution tells you something about the population you are batching from.

Here is the distribution of the 853,374 disputes initiated in the second half of 2024 by plan type:

Two-thirds of all disputes in this process involve self-funded employer plans. That is a structural fact about where out-of-network shortfalls concentrate in this data — not a statement about any particular employer or administrator.

Two practical uses for a batch program:

• Tag plan type at intake, not at filing. The "No Issuer Response" category — 13.5% of filings where plan type was never established — represents filings that went in without basic counterparty information resolved. Capturing plan type when the claim is first worked costs nothing and keeps your batches out of that bucket.
• Expect your own mix to skew self-funded. If your underpayment inventory looks like the national distribution, roughly two of every three claims you consider batching will involve a self-funded plan. Plan type can matter for how a dispute is routed and who the responsible counterparty is, so make it a standard field in the inventory you review before batching, alongside plan name, service type, and the per-claim calendar.

This sorting step does not decide which claims are worth filing — the fee arithmetic does that. It decides whether the batch you assemble is cleanly documented from the first screen, which is where eligibility problems start.

Who Pays the Entity Fee in a Batched Dispute

For single disputes, the mechanics of who pays the certified IDR entity fee are simple: the loser pays. For batched disputes, the rule is different in a way that affects batch composition directly. Under 45 CFR 149.510(c)(5)(ii), the winner of a batched dispute is the party that prevails on more of the underlying items and services. The loser is the party that prevails on fewer. If the parties win an equal number of items, neither is treated as the winner or loser, and the certified entity fee is split between them.

The economic consequence is straightforward. In a batch of twenty claims where the provider prevails on twelve and the plan prevails on eight, the provider is the batch winner and the plan pays the entity fee in full. In a batch of twenty where the split is ten and ten, the entity fee is divided fifty-fifty. The provider does not pay a per-claim entity fee for the ten it won; it pays a share of the batch entity fee determined by the majority count. This is the principal reason batch composition matters beyond the four statutory eligibility criteria.

A batch that includes some weaker claims alongside stronger ones is not paying a per-claim penalty for the weaker ones. It is rolling them into a single majority calculation. If the relative strength of claims is unclear at filing time, a batch that splits ten and ten is a real outcome, and the entity fee is paid by both sides rather than by the loser alone.

The published data gives a base rate for the underlying merit question. Of 698,968 payment determinations in the second half of 2024, providers, facilities, and air ambulances won 596,789 (85.4%); plans and issuers won 101,639 (14.5%). Split decisions — where the entity did not choose one party's offer — numbered 538, or 0.08% of all decisions. The 0.08% figure is about entity selection between offers on a single dispute, not about batch majority splits; the two are different mechanics but both speak to how rarely the process produces ambiguous outcomes.

Three things to do with this: before assembling a batch, rank the candidate claims by your confidence in the offer you will submit, not just by dollar value. The fee exposure runs through the batch majority, not through each claim individually. A claim that is uncertain to win should be weighed against its effect on the batch split, not just against its own recovery. If your candidate set contains an uncertain claim that could tip a batch from a clear win to a tie, leave it out and consider filing it singly or not at all.

How much is the federal IDR administrative fee now?

$15 per party per dispute for disputes initiated on or after 11 June 2026, reduced from $115 under the Federal IDR Operations final rules. It is non-refundable regardless of outcome.

Do small claims really recover more than large ones?

In proportion, yes. CMS Table 13 for Q4 2024 shows a median prevailing offer of 5.53x QPA on claims under $100, falling to 1.73x on claims of $10,000 and above. In absolute dollars a large claim still recovers more; the percentage gap is what inverts.

What are the requirements for batching IDR claims?

Batched claims must involve the same or similar items and services, the same plan or issuer, and fall within a defined period. Batching claims that do not qualify together exposes the entire batch to an eligibility challenge.

Does batching extend the filing deadline?

No. Each claim keeps its own 30-business-day open negotiation period and its own four-business-day window to initiate IDR.