icd9IsReal: Check whether ICD-9 codes exist

In jackwasey/icd9: Tools for Working with ICD-9 Codes, and Finding Comorbidities

Description

This is different from syntactic validity: it looks it up in the canonical list of ICD-9 codes published by the CMS, and which are included in this package under extdata. Checking syntactic validity using link{icd9IsValid} etc. is still useful, with a changing list of icd-9 codes over time, and possible imperfections in the master lists derived from CMS.

Usage

icd9IsReal(icd9, isShort = icd9GuessIsShort(icd9), onlyBillable = FALSE)

icd9IsRealShort(icd9Short, onlyBillable = FALSE)

icd9IsRealDecimal(icd9Decimal, onlyBillable = FALSE)

icd9GetReal(icd9, isShort = icd9GuessIsShort(icd9), onlyBillable = FALSE)

icd9GetRealShort(icd9Short, onlyBillable = FALSE)

icd9GetRealDecimal(icd9Decimal, onlyBillable = FALSE)

Arguments

icd9	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".
isShort	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.
onlyBillable	single logical value (default FALSE), if TRUE will divert to test whether the codes are in the billable list instead of seeing if they are any leaf or branch node.
icd9Short	is a character vector 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"
icd9Decimal	character vector 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"

Value

logical vector

Functions

• icd9IsRealShort: Are the given short-form codes defined at heading or leaf (billable) level?

• icd9IsRealDecimal: Are the given decimal-form codes defined at heading or leaf (billable) level?

• icd9GetReal: Return only those codes which are heading or leaf (billable), specifying whether codes are all short-form or all decimal-form

• icd9GetRealShort: Return only those short-form codes which are heading or leaf (billable)

• icd9GetRealDecimal: Return only those decimal-form codes which are heading or leaf (billable)

jackwasey/icd9 documentation built on May 18, 2019, 7:57 a.m.