AcyclicLabs
← Eval examples

Can she dispute her surgery bills?

Our uninsured patient Dana Kowalski had knee arthroscopy on 2026-06-01 and received a good faith estimate. She says all three of her bills (ours, the anesthesia group's and the surgery center's) are far above the estimate and wants to dispute them. Today is 2026-10-12. Which of the bills, if any, qualify for the federal patient-provider dispute process, by when must she file, what does it cost her, and what must our billing office do or stop doing? Our notes and our policy disagree.
agents
14 agents
wall time
6:15 wall time
quotes confirmed at their source (2 not found on the page)
19 quotes confirmed at their source (2 not found on the page)
web lookups
70 web lookups
inference and sandboxes
$1.25 inference and sandboxes
rubric items
10/11 rubric items

From swarmbench's healthconflict dataset. The patient, clinic, bills and notes are fictional; the federal rules are real.

The billing office's note is the trap: it pools the three bills, misstates the patient's fee and gives the wrong filing deadline. The run flagged all three.

The agents did not choose their strategy alone: the root agent got the question together with our research instructions (split the work by document and source, keep a shared ledger in /shared, check every quote at its source). Those instructions, the harness's role preamble and internal ids are left out of the transcripts below; everything else is as it happened.

Graded 10 of 11 rubric items by Claude Opus 5.5, below the median of our 6 swarm runs of this question (11/11; range 10–11). Single agents given the same question also scored 10–11 (median 11). This run is shown because it has every agent's full transcript. The rubric is held back so the question stays a usable test.

Models: gpt-5.6-luna, gpt-5.6-sol.

The root agent's final answer

Final answer: Assuming Dana meets the federal uninsured/self-pay and GFE prerequisites, none of her three bills clearly qualifies on the supplied provider-specific figures: Riverbend is $95 below its $1,850 estimate on the clearly estimated surgeon items, anesthesia is only $370 over, and the surgery center is only $360 over; the three overages cannot be pooled. If the Riverbend therapy/strapping lines are Riverbend items furnished with the arthroscopy, Riverbend may instead be $440 over and eligible, but that unresolved attribution must be confirmed immediately; its filing deadline is November 17, 2026, while anesthesia's deadline has passed and the ASC's would be November 29, 2026. Confidence: 86%

What to do

  • Compare each provider separately. 45 C.F.R. §149.620 uses the total billed by a particular provider/facility against the expected charges for that specific provider/facility. It does not permit the memo's $6,070-versus-$4,900 aggregation.
  • Buckeye Anesthesia: $1,020 − $650 = $370, below the “at least $400” threshold. It therefore does not qualify on these figures. Moreover, if she received the initial bill on the June 2 statement date, 120 days ran on September 30, 2026, so an October 12 filing is late. (Actual receipt, not merely statement date, controls; proof of later receipt or an HHS extenuating-circumstances extension could change timing.)
  • Westside Surgery Center: $1,950 + $410 + $400 = $2,760; $2,760 − $2,400 = $360, below threshold. It does not qualify on these figures. If it did and she received it on the August 1 statement date, the cutoff would be November 29, 2026.
  • Riverbend: The explicitly estimated surgeon services total $1,540 + $215 + $0 = $1,755, which is $95 below the $1,850 surgeon estimate. The June 22 therapy and strapping total $535 and were not named in that GFE row. The bill identifies Riverbend, but the records do not establish whether those later services were items furnished in conjunction with the primary service by the same provider for the federal total-billed-charge rule. If included, $2,290 − $1,850 = $440, making Riverbend eligible. Confirm provider identity, relation to the arthroscopy, and actual initial-bill receipt date now. If the initial bill was received on July 20, the postmark cutoff is November 17, 2026; today, October 12, it remains timely.
  • The filing period is 120 calendar days after receipt of the initial bill, not one year after surgery. The dates above assume same-day receipt of each statement and thus are conservative working dates. The initiation notice must be postmarked within the period.
  • CMS's page in force by October 12 states that Dana pays a $25 non-refundable fee to start PPDR; confirm the displayed amount when filing because 45 C.F.R. §149.620(g)(2) permits HHS to change it through guidance. This contradicts the memo's “no fee.” If she prevails, the determination reduces the amount owed by $25.
  • Billing office now: because no qualifying dispute has yet been shown or initiated, PPDR's pending-dispute collection prohibitions have not formally attached. Nevertheless, cancel the scheduled October 16 referral while the possible Riverbend eligibility is urgently clarified and Dana has a fair opportunity to file. Once a PPDR request is pending, do not move or threaten to move the disputed bill to collections; stop existing collection pursuit; suspend late fees; and take no retributive action.
  • If Riverbend is notified that its dispute is eligible, submit to the SDR within 10 business days of the selection notice readable copies of the GFE and bill and any available evidence that the difference reflects medically necessary services and unforeseen circumstances. If the parties settle, notify the SDR within 3 business days and reduce the settlement by at least half the fee ($12.50 at the current fee).

Conflicts found

  • Billing office note (October 6, 2026) vs FIN-14 (January 2022) and federal rule: the note pools all three bills and says all can be brought in one dispute. FIN-14 correctly says eligibility is provider/facility-specific; 45 C.F.R. §149.620 governs and confirms FIN-14 on this point.
  • Billing office note vs federal rule: “one year from surgery” is wrong. Section 149.620(c)(1) governs: 120 calendar days after receiving the initial bill. The policy's “date on the initial bill” is close but imprecise because receipt controls.
  • Billing office note vs current CMS guidance: “No fee” is wrong. CMS's page modified October 2, 2026 says $25 non-refundable and that processing starts only after payment. FIN-14's $25 amount is right, although it imprecisely calls this a payment to the federal government; the patient pays the SDR entity.
  • Billing office note vs federal rule: the planned October 16 collection transfer would violate the rule if a Riverbend PPDR is pending. FIN-14's collection/late-fee pause is substantially right. Its phrase “if already in collections we suspend” is stronger than the regulation's “should cease,” but agrees with current CMS patient guidance, which says the provider “must stop pursuing payment.”
  • GFE legal sentence (May 28, 2026): “If you are billed for at least $400 more than this estimate” is overbroad if read as permitting aggregation. The governing comparison is particular-provider/facility versus its own expected-charge total.
  • Riverbend scope: whether the June 22 therapy/strapping charges count in Riverbend's total for this episode is unresolved on the supplied evidence. This is outcome-determinative and must not be silently assigned either way.

Not actually conflicts

  • The memo's arithmetic is correct: all bills total $6,070 and exceed the $4,900 GFE by $1,170. It is the legal use of that aggregate—not the arithmetic—that is wrong.
  • Anesthesia's 84 minutes versus the 60-minute estimate helps explain the charge but does not change its $370 provider-specific shortfall from the statutory threshold.
  • Different working deadlines reflect different initial bills; federal timing runs from receipt of each initial bill, not the June 1 surgery date.
  • The Fall 2026 flu/COVID clinic schedule is unrelated to Dana's arthroscopy and PPDR; its event details were not independently established by the primary source checked.

Document audit

  • local-bill-anesthesia: Holds as evidence of a June 2 statement, DOS June 1, CPT 01400, 84 minutes, and $1,020 balance. Against the GFE it is $370 over, so not eligible; timing is also expired under assumed same-day receipt.
  • local-bill-asc-itemized: Holds as evidence of an August 1 statement and three charges totaling $2,760. CMS code labels correspond generally to ambulatory surgery, sterile supplies, and recovery. It is $360 over the ASC estimate, so not eligible on the supplied figures.
  • local-bill-riverbend-ocr: Partly holds; OCR arithmetic (including O/0 normalizations) is internally correct at $2,290, but “amount due” and statement date do not prove total billed charge or receipt date. Surgeon-listed estimated items total $1,755. Attribution/episode scope of the $535 therapy and strapping is unresolved, creating the conditional $440 Riverbend excess.
  • local-billing-office-memo: Partly right on aggregate arithmetic ($6,070 − $4,900 = $1,170) and the existence of a $400 rule. Wrong on aggregation, one combined dispute, one-year deadline, and no fee. Its October 16 collection plan should be stopped pending urgent review and would be prohibited while PPDR is pending.
  • local-flu-clinic-schedule: Off-scope. General advice to bring an insurance card had some official support; the specific 2026 sites, dates, hours, walk-in status, and $35 price were not verified and do not affect Dana.
  • local-good-faith-estimate-2026-05: Holds for Dana’s name/DOB, May 28 estimate date, scheduled June 1 service, named provider/facility rows, and correct $4,900 arithmetic. Its abbreviated $400 notice needs provider-specific and timing qualifications; auditors also found required identifying/detail fields absent from this local copy.
  • local-self-pay-policy-2022: Partly right: provider-specific $400 test, 120-day concept, $25 fee, and pending-dispute protections. Imprecise on GFE timing, deadline trigger (receipt controls), and fee recipient; it omits request-based and substituted-provider details.

Sources

  1. 45 C.F.R. §149.620 (rule applicable on October 12, 2026; later checked in current eCFR): https://www.ecfr.gov/current/title-45/subtitle-A/subchapter-B/part-149/subpart-G/section-149.620
  2. CMS, Dispute a medical bill, page modified October 2, 2026: https://www.cms.gov/medical-bill-rights/help/dispute-a-bill
  3. CMS/CCIIO, Calendar Year 2023 HHS PPDR Fee Guidance (October 31, 2022), background on fee mechanics: https://www.cms.gov/cciio/resources/regulations-and-guidance/downloads/patient-provider-dispute-resolution-administrative-fee-cy-2023.pdf
  4. 42 U.S.C. §§300gg-136–137 (statutory GFE/PPDR framework), GovInfo: https://www.govinfo.gov/link/uscode/42/300gg-136 and https://www.govinfo.gov/link/uscode/42/300gg-137