icd9_chapters_to_map

<p>Either a chapter list itself, or the name of one, e.g.
<code>icd9_sub_chapters</code></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 in bulk with <code>lapply</code> and <code>icd_short_to_decimal</code>.</p>

manip

internal

Calculate comorbidities, Charlson scores, perform fast and accurate
validation, conversion, manipulation, filtering and comparison of ICD-9 and
ICD-10 codes. Common ambiguities and code formats are handled. This
package enables a work flow from raw lists of ICD codes in hospital
billing databases to comorbidities. ICD-9 and ICD-10 comorbidity mappings
from Quan (Deyo and Elixhauser versions), Elixhauser and AHRQ included. This
package replaces 'icd9', which should be uninstalled.

Jack O Wasey

icd9_chapters_to_map: convert the chapter headings to lists of codes

Description

Usage

Arguments

See Also