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Peter E. DeWitt, Ph.D.

@peteredewitt.bsky.social

#biostatistics, #rstats, #EHR, #sepsis, #pediatrics, #PublicHealth, #HealthInformatics, #DataScience, #ClinicalResearch, #GoAvsGo, #woodworking

Posts Replies Media

Peter E. DeWitt, Ph.D. @peteredewitt.bsky.social · 05/10/2026

medicalcoder 0.10.0 is now on CRAN! This release adds FY 2027 ICD-10-CM diagnosis and ICD-10-PCS procedure code sets. ICD lookup, validation, and longitudinal comorbidity assessment in R—all reference data included. cran.r-project.org/package=medi... #RStats #PublicHealth #ICD #Comorbidities

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Peter E. DeWitt, Ph.D. @peteredewitt.bsky.social · 16/07/2026

medicalcoder 0.9.0 is now on CRAN What’s new: Charlson methods, ICD-10-AM, ICD-10-SE Why use it: self-contained, longitudinally aware, auditable mappings #rstats #HealthInformatics #EHR #ClinicalResearch #RiskAdjustment #PublicHealth #comorbidity #Charlson #Elixhuaser #PCCC #pediatrics

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Peter E. DeWitt, Ph.D. @peteredewitt.bsky.social · 05/05/2026

I had the opportunity to present the medicalcoder R package as a short talk and a poster at the @cubiomedinfo.bsky.social Spring 2026 Symposium. #BiomedicalInformatics #RStats #HealthDataScience #ClinicalResearch

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Peter E. DeWitt, Ph.D. @peteredewitt.bsky.social · 25/03/2026

Just practicing hand cut dovetails #woodworking #handtools

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Peter E. DeWitt, Ph.D. @peteredewitt.bsky.social · 23/03/2026

I made this dice tower for some friends. Four baffles inside the tower. #woodworking

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Peter E. DeWitt, Ph.D. @peteredewitt.bsky.social · 20/03/2026

My abstract has been accepted for presentation at R/Medicine 2026. I’ll be my R package, medicalcoder. www.peteredewitt.com/medicalcoder/ Thank you @rconsortium.bsky.social for putting on the conference! #rstats #RMedicine #HealthInformatics #EHR #ClinicalResearch

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Peter E. DeWitt, Ph.D. @peteredewitt.bsky.social · 09/03/2026

Same ICD codes. Same patient. Different risk profiles. Encounter-level comorbidity logic assumes ICD codes are re-reported every visit. They usually aren’t. medicalcoder handles this 📦install.packages("medicalcoder") #rstats #HealthInformatics #EHR #ClinicalResearch #RiskAdjustment #PublicHealth

Diagram comparing longitudinal vs encounter-level comorbidity detection using ICD-10 codes across five patient encounters.

Top panel (Longitudinal): The patient initially has uncomplicated diabetes (E11.9). Later an encounter includes E11.22 and K72.10, indicating complex diabetes and severe liver disease. Using longitudinal logic, these conditions persist in later encounters even when only E11.9 appears, preserving severity and correctly flagging severe liver disease.

Bottom panel (Encounter-level): Each encounter is evaluated independently. Diabetes changes from uncomplicated → complex → back to uncomplicated when E11.9 reappears, and severe liver disease is never flagged because its code does not repeat.

Message: Ignoring patient history can downgrade severity or fail to identify comorbidities.

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Peter E. DeWitt, Ph.D. @peteredewitt.bsky.social · 23/02/2026

📦 medicalcoder v0.8.0 is now on CRAN. medicalcoder is a unified and longitudinally aware framework for ICD-based comorbidity assessment in #rstats CRAN: cran.r-project.org/package=medi... GitHub: github.com/dewittpe/med... Website: peteredewitt.com/medicalcoder/

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