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Changelog

Source: NEWS.md

medicalcoder 0.7.0.9000

New Features

  • If a tibble is passed to comorbidities() and the dplyr namespace is available, then dplyr methods will be used for data manipulation. This change will generally result in less computation time than base R data.frames (data.tables require even less time).

  • Add the elixhauser_ahrq2026 method for comorbidities() (#32)

Bug Fixes

  • summary.medicalcoder_comorbidites() no longer crashes when a zero row input is passed in. Consistently return NA instead of NaN when counts are zeros. (#26, #27)

  • Improve the conditional and multiple comorbidities mapped by a code under AHRQ ICD-10 codes for fiscal years 2023 through 2026. The bug was found and fixed as part of the extension #32.

Other Changes

  • Extend and improve the internal ICD-9 database to distinguish between CDC and CMS source.

  • Fix documentation of the mdcr and mdcr_longitudinal datasets.

  • Clarified internal data.frame/data.table helpers: documented that mdcr_select() deep-copies data.table subsets to avoid aliasing, noted the selfref fix in mdcr_set(), and added inline guidance in the longitudinal section of comorbidities() to explain the first-occurrence logic.

  • Improve cumulative flagging to apply first-occurrence logic more efficiently.

  • Extend documentation for the expected default behavior between the present-on-admission flags and flag.method argument in comorbidities() (re: #28)

  • Add mdcr_unique() to the data.frame utilities. This reduced the computational time required to apply comorbidities() to tibbles and data.tables. (#31)

medicalcoder 0.7.0

CRAN release: 2025-11-22

Bug Fixes

  • Elixhauser AHRQ 2022 - 2025

    • exclusions for less severe conditions when more severe conditions are flagged.
    • Improved POA, NPOA, and EXEMPTPOA. This came about from #20.

  • Make internal data.frame tool mdcr_duplicated() data.table aware.

  • Elixhauser (Quan 2005) - added missing ICD-10 codes to the mappings

New Features

  • comorbidities() will return a tibble when the input data is a tbl_df (#9). Assuming the data.table and/or tibble namespaces are available, then the initial release (v0.6.0) would return a data.table if a data.table was passed to a comorbidities() due to the S3 method dispatches. If a tibble (tbl_df) or a data.frame was passed to comorbidities() then the return would be a data.frame. In this release we have added logic to determine if the input is a tibble and if the tibble namespace is available, then the return from comorbidities() will be a tibble (or list of tibbles when subconditions = TRUE).

    The tests were extended to consider the cases of passing in a data.table or tibble to comorbidities when the associated namespaces are not available.

  • Added elixhauser_ahrq_icd10 to use all the ICD codes ever defined from 2022 to 2025. This will capture any future years as well.

Other Changes

  • Improve formatting of vignettes/articles.

medicalcoder 0.6.0

CRAN release: 2025-10-15

  • Initial CRAN submission, providing a dependency-free toolkit for ICD-9/10 code lookups
  • Introduces a unified comorbidities() interface covering Charlson (Deyo, Quan 2005/2011, Glasheen), Elixhauser (original, Quan 2005, AHRQ 2017-2025), and Pediatric Complex Chronic Conditions (v2.0/2.1/3.0/3.1).
  • Adds support for present-on-admission indicators, longitudinal look-back, age scoring, and PCCC sub-condition flags within comorbidities().
  • Bundles curated ICD dictionaries alongside example datasets (mdcr, mdcr_longitudinal) for reproducible testing and demonstrations.
  • Includes vignettes and benchmarking summaries that document usage patterns and showcase performance without non-base dependencies.