icd9ChaptersToMap

<p>Either a chapter list itself, or the name of one, e.g.
icd9ChaptersSub</p>

<p>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>.</p>

manip

internal

Calculate comorbidities, and perform fast and accurate
validation, conversion, manipulation, filtering and comparison of ICD-9-CM
(clinical modification) codes. ICD-9 codes appear numeric but leading and
trailing zeroes, and both decimal and non-decimal "short" format codes
exist. The package enables a work flow from raw lists of ICD-9 codes from
hospital billing databases to comorbidities. ICD-9 to comorbidity mappings
from Quan (Deyo and Elixhauser versions), Elixhauser and AHRQ included.

Jack O Wasey

icd9ChaptersToMap: convert the chapter headings to lists of codes

Description

Usage

Arguments

See Also