icd9 (version 0.5)

icd9Explain: explain ICD9 codes

Description

convert full format (123.45 style) ICD9 codes into the name and description for human review there are official ICD9-CM data tables, not with conversion to decimal notation, but to the textual format.

Usage

icd9Explain(icd9, isShort, doCondense = TRUE)
icd9ExplainShort(icd9Short, doCondense = TRUE)
icd9ExplainDecimal(icd9Decimal, doCondense = TRUE)
## S3 method for class 'list':
icd9Explain(icd9, isShort, doCondense = TRUE)
## S3 method for class 'character':
icd9Explain(icd9, isShort, doCondense = TRUE)
## S3 method for class 'numeric':
icd9Explain(icd9, isShort, doCondense = TRUE)

Arguments

icd9

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"

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"

isShort

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

doCondense

single logical value which indicates whether to condense the given set of ICD-9 codes by replacing subsets of codes with 'parent' codes which exactly encompass certain subsets. E.g. If all cholera diagnoses are provided, only '001 - Cholera' needs to be d

Value

• data frame, or list of data frames, with fields for ICD9 code, name and description, derived from datamart lookup table

Methods (by class)

• list: explain alll ICD-9 codes in a list of vectors
• character: explain character vector of ICD-9 codes
• numeric: explain numeric vector of ICD-9 codes, with warning

References

http://www.stata.com/help.cgi?icd9

See Also

package comorbidities

Examples

icd9ExplainShort(ahrqComorbid[[1]][1:3])