He decided healthcare's provider data should feel like an API call, not a fax machine - then spent years building the operating system to prove it.
By the numbers, by the fields, by the fax machines he wanted gone.
Open a doctor's application to join an insurance network and you used to find 40 pages waiting. By the time someone keyed it all in by hand, half the information had already gone stale. Anshul Rathi watched that happen up close, and his reaction was not sympathy - it was the urge to rewrite the schema.
Today Rathi is the founder and CEO of CertifyOS, a New York company that credentials a clinician in under two minutes using six pieces of information. The pitch is almost rude in its simplicity: provider data should be one source of truth, refreshed against primary sources, available through a single API. Most of healthcare still treats it like a filing cabinet. He treats it like infrastructure.
The conviction came from the inside. Rathi was one of the earliest employees at Oscar Health, the venture-backed insurer, where he was handed the job of building provider network management more or less from scratch. Over roughly six years he helped construct the company's provider data infrastructure and watched Oscar grow from two states to twenty. Scaling that fast teaches you exactly where the plumbing leaks.
What he kept running into was a market full of point solutions - tools "primarily built for compliance and security," as he has put it, that checked a regulatory box but never fixed the underlying mess. The data stayed dirty. The forms stayed long. And the consequences, he realized, were not abstract.
He conceived CertifyOS in 2018 and started building during the pandemic, turning lockdown into a launchpad. The name is also the thesis: an operating system for certification. Instead of patching the old workflow, he wanted to replace the fax-and-form ritual with software that behaves the way engineers expect software to behave.
That belief hardened into three rules he repeats like a refrain. API-first: eliminate manual data entry. Data-first: wire directly into primary sources and verify provider records on a monthly cadence so they never rot. Automation-first: ask for six key data elements and let the system do the other 39 pages of work. The platform now tracks more than 1,600 data points per provider, which is a strange and specific number that tells you exactly how seriously he takes the word "complete."
Standardized APIs that eliminate the need for manual data entry. Credentialing should be a call, not a clipboard.
Direct connections to primary sources, with provider data re-verified monthly so it never goes stale on the shelf.
Six key data elements replace the 40-page application. The system does the rest, in minutes instead of months.
Strip away the product and you find a single ambition that has not moved since 2018. Rathi wants a healthcare industry where one source of truth for provider data exists for everyone touching it - the plan, the system, the digital health startup, the patient on the other end. Less paperwork, more care, and a lower cost of healthcare as the byproduct.
The market has started to agree. CertifyOS raised a $14.5M Series A in 2022 to harden its automation for credentialing, licensing and enrollment. Then in June 2025 it closed a $40M Series B led by Transformation Capital, with returning backers General Catalyst and Upfront Ventures and new investor SemperVirens joining in. Total funding climbed to roughly $69M, on the back of revenue that, by the company's account, tripled year over year. Clients report up to 40% lower administrative costs and a 30% jump in data accuracy, with the platform hitting 99.8% field-level accuracy.
He is careful not to call any of it a finish line. When the Series B landed, his framing was deliberately unsentimental: "This funding is the latest marker in Certify's dramatic growth trajectory." A marker, not a monument. The new capital goes into product, engineering and go-to-market - the unglamorous work of making the plumbing reach more buildings.
Rathi's path reads like an engineer's, because it is one. He earned a Bachelor of Engineering in electrical and electronics engineering from Nagpur University in India, then a Master of Science in innovation management from Brown University, where he later served as an Entrepreneur in Residence. Before Oscar Health he worked at Packet and did a stint as a venture analyst at WAM Partners, the William Moses Co. - a useful vantage point for someone who would later have to raise tens of millions himself.
The throughline is patience with hard, boring problems. He spent six years living inside the provider-data swamp before he was confident enough in the fix to name it. That is not the timeline of someone chasing a trend; it is the timeline of someone who wanted to be right. CertifyOS runs as a remote-first company of around 270 people, and Rathi still talks about the work in the flat, declarative language of someone describing a system spec rather than a moonshot.