The icdcomorbid R package provides a comprehensive toolkit for mapping International Classification of Diseases (ICD) codes to comorbidities. It offers versatile functionality to categorize diagnoses into standard comorbidity groups established in the medical literature. The package is inspired by the need for robust comorbidity interpretations in healthcare research and practice. Leveraging established methodologies such as those outlined by Charlson et al. (1987), Quan and Deyo (2005), and Elixhauser et al. (1998), this package simplifies the process of identifying and quantifying comorbidities in patient populations. With an emphasis on efficiency and accuracy, icdcomorbid empowers researchers, clinicians, and healthcare professionals to extract meaningful insights from medical data, driving advancements in patient care and clinical decision-making.

You can install the icdcomorbid package from CRAN using the following command:

install.packages("icdcomorbid")

Formats ICD codes by adding decimal points to match standard formats.

Reshapes data from long format (multiple rows per patient) to wide format (one row per patient with multiple columns for diagnoses). This transformation is essential before applying comorbidity calculation functions.

Maps ICD-9 codes to standard comorbidity indices using either the Charlson or Quan-Elixhauser index.

Maps ICD-10 codes to standard comorbidity indices using either the Charlson or Quan-Elixhauser index.

Assigns patients to episodes of care, useful for analyzing patient treatment over time.

For any questions or feedback, please feel free to reach out at:

April Nguyen
Email: [email protected]

This package is licensed under the MIT License. See the LICENSE file for more details.