How the No Surprises Act turned a medical bill into four data handoffs

The week

On December 21, 2020, Congress passed the Consolidated Appropriations Act, 2021, a very large year-end package that combined government funding with a second round of pandemic relief. The president signed it on December 27. Inside it was the No Surprises Act, the federal ban on most surprise medical bills that Congress had argued over for several years.

The law protects patients from balance billing for most emergency care, for certain out-of-network services at in-network facilities, and for air ambulance transport. It sends payment disputes between plans and providers to an independent dispute resolution process. It requires good-faith cost estimates for uninsured and self-pay patients, adds duties on provider directory accuracy, and calls for an advanced explanation of benefits. Most provisions took effect on January 1, 2022, with the detail left to rulemaking by HHS, Labor and Treasury.

Surprise billing was rightly framed as a consumer protection problem. Patients who did everything right still received large bills from clinicians they never chose. The remedy Congress wrote did more than prohibit a practice, though. It created a set of handoffs between organizations that rarely exchange data cleanly, and it made the patient’s experience depend on those handoffs working. Read from 2026, the law contains four integration problems, each with a different owner: the estimate, the directory, the dispute and the advanced explanation of benefits.

The estimate: scheduling and billing meet before the visit

For uninsured and self-pay patients, providers and facilities must give a good-faith estimate of expected charges before scheduled care. On paper that is a document. Operationally it is a join between the scheduling system, the chargemaster, the clinical order and, when several clinicians are involved, the systems of other organizations that will deliver part of the care.

Many organizations met the first requirement with templates and manual work, which was a reasonable start. The harder problem is that an estimate is only as good as the order behind it, and orders change. A patient quoted one figure at scheduling who receives a much larger bill after discharge has not experienced compliance. The old surprise has returned in a new form, and the law gives uninsured patients a dispute process when the bill substantially exceeds the estimate.

The durable fix puts estimates on the scheduling data path. The estimate is generated from the scheduled procedure and its usual components, and refreshed automatically when the order changes. Patient financial counselors handle the exceptions instead of building every estimate by hand. A useful measure is the share of final bills that land within a set tolerance of the estimate, by service line.

The directory: the plan publishes what the provider knows

The law put new weight on provider directory accuracy. Plans must verify directory information on a regular cycle, and providers must send timely updates. Patients who rely on an inaccurate directory get some protection on cost sharing, so errors now carry a cost.

Directory errors are an old problem rooted in data ownership. The plan publishes the directory. The facts in it live in provider credentialing, scheduling and contracting systems: which clinicians practice where, which locations accept new patients, and which contracts are active. Each side has tended to blame the other’s data.

Health systems that treat their own roster as a governed data product are better placed. That means one authoritative source for clinician, location and network status, an owner who answers for its accuracy, and an outbound feed to each plan. The alternative is answering every plan’s attestation request by hand, with different staff giving different answers. A clinician who leaves should disappear from every plan’s directory on a predictable schedule, and someone should be able to prove it.

The dispute: arbitration became a back-office channel

With the patient protected, the plan and the out-of-network provider still have to settle payment. The law created an open negotiation period followed by independent dispute resolution through a federal portal. Each step has deadlines, and each submission needs claim-level evidence about the service, the qualifying payment amount and the factors the arbitrator may weigh.

This is where design met reality hardest. Dispute volumes ran far beyond what the departments had projected. The process was litigated repeatedly, including the Texas Medical Association cases over how arbitrators should weigh the qualifying payment amount, and operating rules changed more than once. For providers and plans, dispute handling became a standing workflow needing case management, document assembly and deadline tracking. Organizations that tried to run it from spreadsheets missed deadlines and lost cases on procedure.

Patients are removed from the middle of the dispute, which was the intent. A provider whose dispute process is chaotic still feels pressure to recover revenue elsewhere, and patients can notice that in prices and collection practices.

The advanced explanation of benefits: the handoff that waited

The fourth piece was the most ambitious. For insured patients, providers would send expected charges to the patient’s plan, and the plan would return a coverage-specific estimate before scheduled care. That requires near real-time exchange of structured data between provider and payer systems. In 2020 no standard form of that exchange existed.

The departments deferred enforcement while standards were worked out. The pattern is instructive. Where the law asked one organization to produce a document, the industry complied, with uneven quality. Where it asked two organizations to exchange structured data quickly, the industry was not ready, and regulators accepted that.

The same pattern applies beyond billing. Patient-facing promises that depend on exchange between organizations take longer to arrive than the statute suggests. Organizations that prepare the underlying data early, such as clean scheduling codes, accurate rosters and order-level pricing, carry less risk when the promise is finally enforced.

With hindsight

The core protection held up. Most insured patients are no longer exposed to balance bills for emergency care, or from anesthesiologists, radiologists and similar clinicians they did not choose at in-network facilities. It is easy to forget how common those bills were.

The machinery around the protection was harder. The dispute process was swamped and litigated, and its rules changed several times. Good-faith estimates became routine but uneven in quality. The advanced explanation of benefits remained unenforced into 2026, still awaiting rulemaking. Federal health policy has kept layering patient experience on data exchange, through price transparency files, information blocking rules and prior authorization interfaces. Health systems that invested in clean provider, pricing and scheduling data found each new requirement less disruptive than the last. Those that met each rule with a one-off workaround kept paying for it again.