Case study · Cross-system linkage
Linking health records across Minnesota health systems — without sharing patient data
A working demonstration of how 11 health systems can contribute to statewide prevalence estimates while patient records stay on-site.
Cross-system linkage
Case study summary
- Problem
- A statewide consortium needed timely, stratified condition estimates across multiple health systems. No single organization could hold all patient records, and privacy and governance rules ruled out centralizing identifiable data.
- Approach
- Standardized clinical data at each contributing site, privacy-preserving record linkage, administrative enrichment, federated cohort queries, and small-cell suppression before any aggregate is published.
- Result
- A runnable end-to-end pipeline and interactive walkthrough — evidence of the infrastructure Stratum Health designs for consortia and public health networks.
Skills demonstrated
- Data pipeline engineering
- Privacy-preserving linkage
- Federated analytics
- Governance & suppression
- Dashboard-ready outputs
Explore the demonstration
Technical readers: OMOP CDM, privacy-preserving record linkage, and federated query details are on the walkthrough and demo pages linked below.