icd9GetChapters

is
a character vector or factor of ICD-9 codes. If fewer than five characters
is given in a code, then the digits are greedily assigned to hundreds, then
tens, then units, before the decimal parts. E.g. "10" becomes "010", not
"0010".

icd9

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

isShort

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.. The querying of the web page to
  get these is already done, and the results saved in the lists
  <code>icd9Chapters</code> etc which define ranges.


internal

Obsolete: 'icd9' is replaced by CRAN package 'icd'.
Calculate comorbidities, Charlson scores, 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. Any
other mapping of codes, such as ICD-10, to comorbidities can be used.

icd9GetChapters: get ICD-9 Chapters from vector of ICD-9 codes

Description

Usage

Arguments