icd9 (version 0.2.1)

icd9InReferenceCode: match ICD9 codes

Description

This does the hard work of finding whether a given icd9 code falls under a group of reference ICD9 codes. icd9Reference is expanded to cover all possible subgroups, then we look for matches where the given ICD9 codes appear in the icd9Reference. http://www.acep.org/Clinical---Practice-Management/V-and-E-Codes-FAQ/

Usage

icd9InReferenceCode(icd9, icd9Reference, short = TRUE,
  shortReference = TRUE, validate = FALSE, validateReference = FALSE)
icd9 %i9in% icd9Reference

Arguments

"icd9,icd9Reference"

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"

short

single logical value which determines whether the ICD-9 code provided is in short (TRUE) or decimal (FALSE) form.

validate

logical whether to validate the input ICD-9 codes for correctness. There may be additional simple checks, e.g. whether the code is of the right type, regardless of this argument.

shortReference

logical, see argument short

Value

• logical vector of which icd9 match or are subcategory of icd9Referenec

See Also

comorbidities.

Examples

"1024" %i9in% "102"
"1024" %i9in% c("102","1025")
c("102", "1024","1025") %i9in% "102"
c("102", "1024","1025") %i9in% c("1024", "1025")
c("102", "1024","1025") %i9in% c("102", "1024", "1025")