icd9_get_chapters

single logical value which determines whether the ICD-9
code provided is in short (<code>TRUE</code>) or decimal (<code>FALSE</code>) form.
Where reasonable, this is guessed from the input data.

short_code

single logical value, defaults to <code>FALSE</code> in most functions.

verbose

This runs quite slowly. Used too rarely to be worth optimizing
 now. This is used to build a master list of ICD-9 codes with their
 respective chapters, sub-chapters, etc..

internal

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

Jack O Wasey

icd9_get_chapters: get ICD-9 Chapters from vector of ICD-9 codes

Description

Usage

Arguments