The Company Getting Paid to Fix a System It Never Had to Replace

American hospitals were spending hundreds of billions of dollars a year on billing infrastructure that consistently failed them, generating mountains of denied claims, uncollected revenue, and manual rework while remaining nearly impossible to disrupt. Everyone knew the billing system was broken, and the companies trying to fix it kept failing.

Raised in Waystar’s June 2024 IPO, marking one of the largest healthcare technology listings of that year.

Here’s what you’ll learn: 

American hospitals quietly accepted for decades that billing was fundamentally broken. Healthcare spending reached $4.3 trillion in 2021, with roughly $350 billion consumed by administrative overhead alone: paperwork, eligibility checks, prior authorizations, claims submissions, and denial appeals that added no clinical value.

The problem started before a single claim was ever filed. Industry data shows that 60% of all denials originate from front-end errors, such as eligibility mismatches and missing authorizations, mistakes that were entirely preventable. Yet most hospitals had spent years and hundreds of millions deploying EHR platforms from Epic and Cerner that were clinical tools first and financial tools never. Billing departments stitched the rest together with aging clearinghouses, manual spreadsheets, and fragmented payer portals that barely held.

The result was predictable and expensive. Hospitals lost 3% to 5% of net revenue annually to leakage even after those EHR investments, a number that stings when the aggregate operating margin for U.S. hospitals runs at just 5.2%. The industry was spending more than $20 billion a year fighting denied claims, and payers knew it.

That last part is important. Commercial insurers and managed care payers had turned claim denials into a deliberate cash management strategy. The more complex the appeals process, the more revenue they recovered through administrative attrition. Providers with understaffed revenue cycle teams simply wrote off contested claims rather than fight them.

A 2026 report covering full-year 2025 data made the scale undeniable. Kodiak Solutions found that more than 2,300 hospitals lost over $48 billion in net revenue to final claim denials and uncollected patient responsibilities in a single year, up 25% from the prior year. Most CFOs understood the problem. Almost none of them were willing to risk a billing disruption trying to fix it.

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In November 2017, Bain Capital engineered the merger of two leading healthcare payment software companies, Navicure and ZirMed, into a single combined entity. The thesis was simple: a unified platform covering the entire revenue cycle would be structurally more valuable than a collection of point solutions. The combined business was renamed Waystar in February 2018 and grew more than 10x over the next five years, from $60 million in revenue to more than $600 million by 2022. In 2019, EQT Partners and the Canada Pension Plan Investment Board acquired a majority stake, valuing the company at $2.7 billion and committing capital to accelerate product investment and acquisitions.

What Waystar built was a philosophy as much as a product. Hospitals were not going to rip out Epic or Cerner. They had spent years and hundreds of millions embedding those systems into clinical workflows, and no CFO was going to sign a contract that put billing operations at risk. Waystar stopped trying to replace those systems and built a cloud-native integration layer that sat alongside them instead. The platform connected with more than 500 EHR and practice management systems, ultimately processing over $2.4 trillion in gross claims annually for more than a million distinct providers, including 16 of the top 20 U.S. News Best Hospitals.

The AI layer, branded AltitudeAI, became the platform's competitive edge. Rather than replacing billing staff, it embedded across Waystar's five core modules to automate the most error-prone steps. On the front end, an intelligent scrubbing engine caught coding errors, missing modifiers, and eligibility mismatches before submission, driving approximately 99% clean-claim rates at first pass. On the back end, predictive models flagged high-risk claims before they reached payers, and when denials did land, generative AI drafted appeal packages in two hours instead of 38, a 90% reduction in time that freed the equivalent of 13 full-time employees at a typical mid-size health system.

The business model reinforced every inch of it. A roughly even split between subscription and volume-based revenue meant Waystar earned more as providers grew. Contracts renewed on two-to-three-year cycles with built-in price escalators, creating structural switching costs without coercive lock-in.

On June 7, 2024, Waystar listed on the Nasdaq under the ticker WAY, selling 45 million shares at $21.50 each and raising $968 million, one of healthcare technology's largest IPOs of that year. With proceeds directed toward debt repayment and platform investment, Waystar entered the public market with a cleaner balance sheet and an accelerating growth profile that most healthcare IT companies couldn't match.

Full-year 2025 revenue reached $1.1 billion, up 17% year-over-year, with Q4 alone growing 24% to $304 million. Adjusted EBITDA margins hit 42% for the year, exceeding the company's long-term 40% target ahead of schedule, while net revenue retention reached 112%. By that point, roughly 40% of total revenue came from AI-embedded workflows, and 30% of new 2025 bookings were driven specifically by AI capability. The flywheel Waystar had designed was working: more claims flowing through the system meant more data training the models, better denial prevention, more revenue captured, and a platform that became harder to leave with every passing quarter.

AltitudeAI, launched in January 2025, prevented $15.5 billion in denials in under a year, reduced appeal time by 90%, and drove double-digit increases in denial overturn rates across the network.

The $1.25 billion acquisition of Iodine Software, completed October 1, 2025, pushed Waystar into the mid-revenue cycle, the stage where up to 60 million claims per year are denied due to documentation errors between care delivery and submission. With only 35% customer overlap, Iodine added more than 1,000 hospitals and expanded Waystar's addressable market by over 15%. Integration ran ahead of schedule, with over 90% of committed cost synergies expected to land in fiscal 2026.

Key takeaways to consider…

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$1.1 billion - Full-year 2025 revenue

42.5% - Adjusted EBITDA margin for FY2025

112% - Net revenue retention rate for FY2025

$15 billion - Claim denials prevented by AltitudeAI in under one year

$1.8 trillion - Annual gross claims volume processed on the platform

60% - share of US patient population healthcare payments touch the Waystar platform annually

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