icd9FilterValid

data frame containing columns for visitId (which is the feault
name), icd9 (default for the icd9 code), and maybe also a POA flag.

icd9df

The column in the data frame which contains the ICD codes.
This is a character vector of length one. If it is <code>NULL</code>, <code>icd9</code>
will attempt to guess the column name, looking for progressively less
likely possibilities until it matche a single column. Failing this, it will
take the first column in the data frame. Specifying the column using this
argument avoids the guesswork.

icd9Field

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, if TRUE will return invalid instead of valid rows.

invert

Filters a data.frame of patients for valid or invalid ICD-9 codes

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.

icd9FilterValid: Filter ICD-9 codes by validity.

Description

Usage

Arguments