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James A. Feinstein

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Open access Sep 2026

medicalcoder: a unified and longitudinally aware framework for International Classification of Diseases code-based comorbidity assessment in R

Abstract Objectives Comorbidity algorithms derived from International Classification of Diseases (ICD) codes are central to risk adjustment and cohort characterization, but existing software inconsistently handles mixed ICD-9/10 data and typically operates at the encounter level. We developed medicalcoder to address th...

Peter E. Dewitt, Seth Russell, James A. Feinstein et al. · 0 citations

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