When TJ Parker sold PillPack to Amazon for roughly $750 million in 2018, he learned something about healthcare data that stuck with him: getting a complete patient record is still absurdly difficult. Now, as a partner at Matrix Partners, he's leading a $26 million Series A round betting that Metriport has cracked that problem.
The San Francisco startup announced Tuesday it closed a Series A round led by Parker, with backing from ARTIS and Y Combinator. Total raised stands at $28.4 million, though the company declined to share its valuation—a choice that's become increasingly common in an uncertain venture market.
Metriport's pitch is straightforward. The company built an open-source platform that pipes into major healthcare data networks and spits out unified patient records through an API. What's less straightforward is the scale it claims to have reached in just over two years: access to records for 340 million individuals across 750,000 providers, processing 4.2 billion network requests monthly. Those are numbers that suggest real traction in an industry notorious for moving slowly.
The platform layers AI summarization atop the raw data, though co-founder Colin Elsinga is quick to note why the company went open-source. "The decisions around how patient information is managed and transformed are too important to trust to a black box," he said in the announcement. It's a pointed comment in an era when healthcare AI projects often stumble over transparency concerns.
Customers Cite Hours Saved
Amazon One Medical is using Metriport, as are Sollis Health and Color Health. Color reported retrieving more than 2,000 records per cancer patient in minutes, saving roughly an hour of administrative work per case, according to a customer case study published on Metriport's site. Sollis Health, a concierge medical service, said the integrated data helped keep 1,000 patients out of emergency rooms last year.
Dr. Scott Braunstein, Sollis Health's chief medical officer, described viewing "prior EKGs, detailed operative reports, imaging, and lab results in seconds" through the platform. That kind of instant access remains rare. Most physicians still fax records or wait days for data from other systems.
Metriport delivers structured FHIR-native clinical records, normalized from disparate sources with automated deduplication. The platform recently earned HITRUST r2 certification alongside existing SOC 2 Type II and HIPAA compliance. Response time to first structured record clocks in under 15 seconds at the 80th percentile, per data the company published.
A Founder With Amazon Pedigree
Dima Goncharov and Elsinga launched Metriport in 2022 after going through Y Combinator's Summer 2022 batch. They raised a $2.4 million seed round that December at a $20 million valuation, according to the company's earlier announcement.
Parker, who contributed significantly to Amazon Pharmacy and Amazon Clinic initiatives after the PillPack acquisition, brings unusual credibility to the deal. "I see dozens of consumer health companies every year, and the best ones are increasingly working with Metriport," he said. That's the kind of statement investors make when they're trying to signal momentum—and Parker would know. He spent years inside Amazon watching which infrastructure bets paid off.
The timing looks deliberate. New CMS rules are tightening requirements for healthcare data exchange. The CMS Interoperability and Prior Authorization Final Rule mandates that certain payers implement HL7 FHIR APIs, with Patient Access API metrics reporting that began January 1, 2026, according to a CMS fact sheet. Eight Qualified Health Information Networks now operate under the TEFCA framework, including CommonWell, eHealth Exchange and Epic Nexus.
That regulatory push is creating tailwinds for companies like Metriport, though competition is stiff. Particle Health, Redox and Health Gorilla all occupy similar terrain in the interoperability-platform market. Redox has launched its own AI capabilities, intensifying the race.
What Comes Next
Metriport plans to use the capital to scale infrastructure and expand AI and machine learning features, with continued emphasis on engineering. The company has integrated into athenahealth's Marketplace and Practice Fusion for certain customers, broadening its reach into clinical workflows.
Goncharov offered an ambitious closing thought in the announcement: "If you've been lucky enough to have a great healthcare experience in the past few years, there's a good chance Metriport helped make it happen." It's the kind of sweeping claim founders make when they believe they're onto something big—whether the data bears it out remains to be seen.
