icd9ChaptersToMap

Either a chapter list itself, or the name of one, e.g.
icd9ChaptersSub

the chapter headings can be converted into the full set of their
  children, and then used to look-up which chapter, sub-chapter, or 'major' a
  given code belongs. Always returns a map with short-form icd-9 codes. These
  can be converted en masse with <code>lapply</code> and <code>icd9ShortToDecimal</code>.

manip

internal

This package allows accurate manipulation, conversion, validation
    and comparison of ICD-9-CM (clinical modification) codes. Although ICD-9
    codes appear numeric, this is not the case, since trailing zeroes, and a
    mixture of decimal and non-decimal "short" format codes exist. Tools to map
    ICD-9 codes to co-morbidities are also provided, with mappings from Quan
    (Deyo and Elixhauser versions), Elixhauser and AHRQ included.

icd9ChaptersToMap: convert the chapter headings to lists of codes

Description

Usage

Arguments