Johns Hopkins Population Health Analytics

Johns Hopkins Population Health Analytics develops and licenses the ACG System, a population health analytics software platform used globally for over 30 years. The system serves commercial health plans, government agencies, health systems, accountable care organizations, and large employers across multiple countries including the United States, Canada, and Sweden.

The ACG System specializes in risk stratification, predictive modeling, and care management optimization through its proprietary multi-morbidity clustering methodology. The platform processes medical claims, pharmacy data, and electronic medical records to assign patients into actuarial cells (Adjusted Clinical Groups) based on morbidity patterns, age, and sex. Core capabilities include identifying high-risk patients before they become high utilizers, adjusting capitation rates, evaluating physician performance with casemix adjustment, and optimizing care coordination.

The system is integrated into multiple healthcare platforms and has facilitated the exchange of billions of dollars in capitation payments. Johns Hopkins backing provides ongoing research and methodology refinement based on original work by Barbara Starfield from the 1970s.

Choose Johns Hopkins ACG System when your organization needs enterprise-grade risk adjustment and population health analytics with proven actuarial validity. The system excels in complex scenarios requiring transparent, clinically relevant casemix adjustment for capitation, care management targeting, or physician performance assessment.

Expect a comprehensive software licensing relationship with access to validated predictive models, detailed documentation, and integration support. The system provides transparency into its methodology, allowing users to understand how patients are categorized and risk-adjusted, which is particularly valuable for regulatory reporting and contract negotiations.

Johns Hopkins ACG System is exclusively focused on healthcare, specifically population health management and risk adjustment applications. The platform serves multiple healthcare verticals including commercial health plans, Medicare and Medicaid programs, integrated delivery networks, and accountable care organizations. The system addresses healthcare-specific challenges including HEDIS quality measurement, care coordination assessment, emergency department utilization classification, and pharmacy adherence monitoring.

The methodology incorporates healthcare-specific clinical logic including 286 Expanded Diagnosis Clusters for disease management program identification and pharmacy-based morbidity groups that classify medications by therapeutic goal, duration, and stability. Global implementations span diverse healthcare systems with country-specific adaptations.

Ideal clients are risk-bearing healthcare organizations with 50,000+ covered lives, including health plans, integrated delivery networks, and ACOs managing value-based contracts. Organizations should have established data infrastructure with access to claims and pharmacy data, and mature population health programs seeking to optimize care management targeting, financial risk adjustment, or provider performance assessment.