The Johns Hopkins ACG System is the world’s leading population health analytics software. The system continues to evolve, providing ever-more refined tools used in the US and across the glove for over 30 years, from commercial health plans and governments to health systems and large employers. The beauty of the ACG System is its ability to combine data from an array of sources to reveal powerful insights that go beyond just medical records. By identifying risk and tracking patients over time, the ACG System can help you plan ahead and reduce health care costs – especially valuable to risk-bearing health systems and provider organizations. Most importantly, the ACG System allows you to be proactive rather than reactive when it comes to your population’s unique health care needs. The system helps you combine a population-level perspective with patient-level behaviors and conditions. And because the system is incredibly flexible and responsive to new information, you can rest assured that no matter what comes next, the ACG System will continuously adapt to your health care management needs.


The Johns Hopkins ACG System offers a unique approach to measuring morbidity that improves accuracy and fairness in evaluating clinician performance, identifying patients at high risk, forecasting health care utilization and setting equitable payment rates.

What is an “ACG®” or “Adjusted Clinical Group®“?

Based on the premise that clustering of morbidity is a better predictor of health care services resource use than the presence of specific diseases or disease hierarchies, the ACG System provides a multi-morbidity framework that is clinically logical, informative of future health care resources, easy to use and applicable to both financial and clinical managers.


The Johns Hopkins ACG® System was developed and continues to be validated and improved by experts at the Johns Hopkins Bloomberg School of Public Health (Center for Population Health IT). The diverse ACG System team is comprised of Johns Hopkins faculty and staff including clinicians, health services researchers and Health Information Technology experts. Johns Hopkins HealthCare Solutions is comprised of experts in population health as well as business, marketing and product development. Together, we develop, maintain and offer the ACG System to commercial health plans, governments, health systems, large employers and researchers worldwide.


The following third-party products enhance and add specific functionality (such as report generation) to the ACG System software, strengthening the end-user’s experience and results. Click on any of the below images to view detailed information about those products.

ACG System Compatible Reporting Tools


Generic Reporting Tools (need configuration)


National Quality Forum (NQF) Certified Tools


Electronic Medical Records Software:

For questions about extending the ACG System functionality to better fit your specific needs, or if you have an Extension you would like featured on this page, please contact your account manager, or fill out the contact form.

Inclusion of the above resources does not imply an endorsement of the companies or the products/services they provide. See Terms page for details.

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