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§ Private Profile · 10 Executive Drive, Farmington, CT 06032, USA
Clinical data interoperability company that normalizes and standardizes health data for healthcare organizations, enabling better workflows.
Diameter Health has raised $27.6M across 2 funding rounds.
Key people at Diameter Health.
Diameter Health has raised $27.6M in total across 2 funding rounds.
Based in Woodbridge, Connecticut, Diameter Health is a clinical data interoperability company that normalizes and standardizes digital health information to make it accessible and actionable across the broader healthcare ecosystem. The enterprise software platform primarily serves health insurance organizations, government agencies, and health information exchanges by supporting critical workflows like care gap closure, quality measurement, risk adjustment, and automated prior authorization. Prior to seeking professional venture capital, the business scaled its operations to over $5 million after initially securing approximately $2.1 million through early friends and family financing rounds. The organization subsequently attracted institutional backing from UnitedHealth Group subsidiary Optum Ventures before being acquired by the national healthcare clearinghouse Availity in August 2022 to integrate into their broader data network. Diameter Health was originally founded in 2013 by co-founders John D'Amore and Eric Rosow.
Diameter Health has raised $27.6M across 2 funding rounds. Most recently, it raised $18.0M Series B in December 2020.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Dec 1, 2020 | $18M Series B | Mark Brooks | Optum Ventures, Activate Venture Partners, Connecticut Innovations, Tripp Peake | Announced |
| Apr 9, 2019 | $9.6M Series A | Optum Ventures | Activate Venture Partners, Connecticut Innovations, Excelerate Health Ventures, Tripp Peake | Announced |
Diameter Health has raised $27.6M in total across 2 funding rounds.
Diameter Health's investors include Mark Brooks, Optum Ventures, Activate Venture Partners, Connecticut Innovations, Tripp Peake, Excelerate Health Ventures.
Key people at Diameter Health.
Diameter Health is a healthcare technology company specializing in clinical data interoperability and optimization. It builds advanced data processing and predictive analytics solutions that normalize, enrich, and integrate clinical data from multiple sources to create clean, actionable insights. Its primary customers include health plans, providers, health information exchanges (HIEs), life insurers, government agencies, and healthcare IT vendors. Diameter Health’s technology addresses the critical problem of fragmented and disorganized clinical data, enabling better decision-making, improved care coordination, risk adjustment, quality measurement, and cost reduction. Since its founding, the company has demonstrated strong growth momentum, culminating in its acquisition by Availity in 2022, which expanded its reach across the healthcare ecosystem[1][2][4][6].
Diameter Health was founded in 2013 in Farmington, Connecticut, with a mission to make digital health data universally accessible, organized, and actionable. The idea emerged from the need to solve the pervasive issue of clinical data disorder—where data from electronic health records (EHRs) and other sources are inconsistent and difficult to use effectively. The company developed its core platform, Fusion, to normalize and enrich clinical data rapidly and cost-effectively. Early traction included partnerships with health information exchanges, payers, and government agencies, and steady growth supported by venture funding totaling over $30 million. The company’s leadership, including CEO Eric Rosow, has emphasized a service-oriented approach and a focus on value-based care[2][3][4][5][6].
Diameter Health rides the critical trend of healthcare data interoperability and value-based care transformation. The timing is crucial as regulatory pressures (e.g., the 21st Century Cures Act) and market demands push for seamless, actionable data exchange across providers, payers, and patients. By enabling high-quality, integrated clinical data, Diameter Health supports initiatives that improve care coordination, reduce costs, and enhance patient outcomes. Its technology helps overcome longstanding barriers in healthcare data fragmentation, influencing the broader ecosystem by facilitating innovation in digital health, analytics, and population health management. The acquisition by Availity further integrates Diameter Health’s capabilities into a larger platform, amplifying its impact on healthcare data exchange and interoperability[1][6][8][9].
Looking ahead, Diameter Health is poised to expand its influence as a foundational technology in healthcare data interoperability under Availity’s umbrella. Trends such as increased adoption of value-based care models, regulatory mandates for data sharing, and the growing importance of whole-person care will shape its trajectory. The company’s focus on automated, scalable data optimization positions it well to support emerging use cases like AI-driven analytics, personalized medicine, and social determinants of health integration. As healthcare stakeholders demand more actionable data to improve outcomes and reduce costs, Diameter Health’s role as a trusted data partner is likely to grow, driving further innovation and efficiency in the healthcare system[1][6][8].
