Recode ICD-10 3-letter codes into broad classification groups

Maps 3-letter ICD-10 codes into standard ICD-10 chapter ranges (e.g., "A00–B99", "C00–D48").

Usage

recode_icd10_class(ICD10_3LETTERS, DGREG = DGREG)

Arguments

ICD10_3LETTERS

A character vector of 3-letter ICD-10 codes.

DGREG

A character scalar or vector indicating the diagnosis coding system. Expected value is "ICD10".

Value

A character vector indicating the ICD-10 classification range, or `NA` if `DGREG` is not "ICD10".

Examples

diagnoses <- diagnoses_raw |>
 dplyr::mutate(
   ICD10_3LETTERS = recode_icd10_3letters(DG, DGREG = DGREG),
   ICD10_CLASS = recode_icd10_class(ICD10_3LETTERS, DGREG = DGREG)
 )
#> Error: object 'diagnoses_raw' not found