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Regenstrief Institute

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Regenstrief Institute is an Indianapolis-based nonprofit research organization focused on improving health care through clinical research, health-services research, and health information technology.

Last updated August 26, 2026

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Overview

Regenstrief Institute is a nonprofit health-services research and informatics organization headquartered in Indianapolis, Indiana. Established in 1969 by industrialist and philanthropist Sam Regenstrief, the institute was created to support practical improvements in the quality, efficiency, accessibility, and continuity of medical care. Its work sits at the intersection of academic medicine, public-health research, clinical operations, and digital health infrastructure. The institute is closely associated with Indiana University and the Indiana University School of Medicine, while remaining an independent nonprofit organization. It operates as a research and implementation partner rather than as a conventional consumer-facing health-care brand. Its researchers study subjects including care delivery, health outcomes, aging, chronic disease, medication safety, emergency medicine, antimicrobial stewardship, health equity, global health, and the use of electronic clinical data in research and practice. Regenstrief is particularly recognized for contributions to health information standards and large-scale clinical data systems. Its researchers helped create and advance LOINC, the Logical Observation Identifiers Names and Codes standard used to identify laboratory tests, clinical measurements, and other observations in electronic health records and data-exchange systems. LOINC is maintained as a freely available global terminology and is used by health-care organizations, laboratories, public-health agencies, researchers, and technology companies. The institute has also played a major role in developing Indiana’s clinical-data infrastructure, including the Indiana Network for Patient Care, a regional health information exchange that links clinical information from participating organizations for authorized care, research, and public-health purposes. Beyond standards and infrastructure, the institute conducts applied research intended to change clinical practice. Its programs commonly use real-world evidence, electronic health-record data, pragmatic trials, implementation science, and health-services evaluation. This orientation reflects the Regenstrief mission of making health care more patient-centered, evidence-based, and coordinated. The organization has also participated in international health-information initiatives and supported open-source or openly distributed tools intended to strengthen care and research in resource-constrained settings. The institute’s influence is therefore institutional rather than retail. It does not primarily sell branded medical products to consumers; instead, it produces research findings, data standards, software and data infrastructure, educational resources, and partnerships that can be adopted across health systems. Its work is relevant to hospitals, physicians, laboratories, government agencies, universities, public-health programs, and health-technology developers. The organization remains active as a nonprofit research institute and continues to combine academic investigation with implementation in real clinical and public-health environments.

History

Regenstrief Institute was founded in Indianapolis in 1969 by Sam Regenstrief, an industrialist and philanthropist who believed that systematic research could make medical care more effective and accessible. From its beginning, the organization was designed to address operational problems in health care through applied research rather than to function solely as a traditional biomedical laboratory or academic department. Its location in Indianapolis placed it within a growing regional medical ecosystem and helped establish long-running relationships with Indiana University, the Indiana University School of Medicine, hospitals, public agencies, and other research institutions. A central theme of the institute’s history has been the use of information generated during routine care. As hospitals began adopting computerized records, Regenstrief researchers investigated how clinical information could be captured, organized, retrieved, and reused for patient care and research. The institute became an early center for medical informatics and helped demonstrate that electronic records could support decision-making, quality measurement, outcomes research, and continuity of care. This work led to the development of the Regenstrief Medical Record System, an early computerized clinical information system associated with the institute’s research program. The system provided a foundation for studying longitudinal patient records and for testing methods of delivering relevant information to clinicians. The institute’s informatics work later expanded from individual institutional systems to the problem of exchanging comparable information across laboratories, hospitals, health systems, and public-health organizations. In the 1990s, Regenstrief researchers, including Clem McDonald and collaborators, developed LOINC to address the lack of a common identification system for laboratory tests and clinical observations. LOINC gave observations standardized identifiers and names so that results produced by different laboratories or electronic systems could be compared and exchanged more reliably. The terminology was distributed without licensing fees, helping it gain international adoption. LOINC is now maintained through a dedicated global community and remains one of the institute’s most visible contributions to health-data interoperability. The institute also helped build the Indiana Network for Patient Care, one of the United States’ early regional health information exchanges. The network connected data from multiple participating organizations and made selected information available to authorized users for clinical treatment, research, and public-health purposes. Its development illustrated Regenstrief’s broader approach: combining technical infrastructure with evaluation of how information changes care, outcomes, costs, and population health. Alongside informatics, the institute has maintained a broad health-services research portfolio. Researchers have examined chronic illness, geriatrics, medication use, emergency care, infection control, care transitions, patient safety, health equity, and methods for implementing evidence in everyday clinical settings. Many projects have been conducted in partnership with Indiana University, Indiana University Health, government agencies, foundations, and external academic or clinical organizations. Regenstrief has also supported international health-information work, including efforts to adapt digital tools, standards, and implementation methods to settings with limited resources. Its activities have included collaborations involving open-source clinical information systems and global health research. Across these programs, the institute’s identity has remained consistent: it seeks measurable improvements in health care by connecting rigorous research with usable information systems, standards, and delivery practices. Today, Regenstrief Institute remains an active nonprofit research organization. Its work spans health informatics, clinical and translational research, health-services evaluation, implementation science, public health, and global health. Rather than offering a conventional commercial product portfolio, it creates standards, evidence, data infrastructure, and partnerships that other organizations can incorporate into health-care delivery and research.

  • 1994

    LOINC introduced

    [4]

    Regenstrief researchers introduced LOINC to provide standardized identifiers for laboratory tests and clinical observations.

  • 1969

    Institute founded in Indianapolis

    [2]

    Sam Regenstrief established the nonprofit institute to support practical research aimed at improving the quality and efficiency of health care.

  • Development of the Regenstrief Medical Record System

    [1]

    The institute became an early site for research into computerized longitudinal medical records and the use of clinical information in care delivery.

  • Indiana Network for Patient Care developed

    [5]

    The institute helped create a regional health information exchange linking clinical data from participating organizations for authorized care, research, and public-health use.

Products and positioning

A nonprofit, research-driven health informatics and health-services organization that converts clinical data, standards, and evidence into practical improvements in care delivery.

  • Clinical terminology and interoperability standard · 1994

    LOINC

    LOINC, or Logical Observation Identifiers Names and Codes, is a universal coding system for laboratory tests, clinical measurements, survey instruments, and other health observations. It allows results generated by different laboratories and information systems to be identified and compared consistently. The standard is openly available and is used in electronic health records, health information exchange, public-health reporting, research databases, and international interoperability programs.

  • Health information exchange

    Indiana Network for Patient Care

    The Indiana Network for Patient Care is a regional clinical information exchange associated with Regenstrief Institute. It brings together selected data from participating health-care organizations and makes information available to authorized users for purposes such as treatment, care coordination, research, and public health. The network is an important example of the institute’s emphasis on applying informatics infrastructure to real-world health-care delivery.

  • Electronic clinical information system

    Regenstrief Medical Record System

    The Regenstrief Medical Record System was an early computerized clinical information system developed for research into longitudinal patient records and clinical decision support. It helped establish the institute’s reputation in medical informatics and provided a platform for studying how structured electronic information could improve continuity, quality, and efficiency of care.

Recent events

  • Regenstrief Institute continues stewardship and international use of LOINC[3]

    Other

    The institute remains responsible for the development and dissemination of LOINC, a widely used terminology for laboratory and clinical observations that supports electronic data exchange and interoperability.

  • Regenstrief Institute advances clinical data exchange through the Indiana Network for Patient Care[5]

    Other

    The institute continues to operate and develop a regional clinical information infrastructure intended to support authorized clinical care, research, and public-health activities.

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