Calculation of Comorbidity and Frailty Scores R package LABTNSCPSS version 1.0.2 Computes comorbidity indices and combined frailty scores for multiple ICD coding systems, including ICD-10-CA, ICD-10-CM, and ICD-11. The package provides tools to preprocess episode data, map diagnosis codes to chronic categories, propagate conditions across episodes, and generate comorbidity and frailty measures. The methods implemented are original to this package and were developed by the authors for research applications; a manuscript describing the methodology is currently in preparation. Software Depends: R (>= 4.3.0) Imports: dplyr, magrittr, tibble, checkmate, tidyselect, data.table, stringi, lubridate, purrr, tidyr, glue Suggests: testthat (>= 3.0.0) Azadeh Bayani <azadeh.bayani@umontreal.ca> Comprehensive R Archive Network (CRAN) Azadeh Bayani [aut, cre] (ORCID: <https://orcid.org/0009-0002-7707-9602>), Jean Noel Nikiema [ctb], Michèle Bally [ctb] GPL-3 2026-03-26 application/tgz https://CRAN.R-project.org/package=LABTNSCPSS doi:10.32614/CRAN.package.LABTNSCPSS