icd9IsBillable: Determine whether codes are billable leaf-nodes
In icd9: Tools for Working with ICD-9 Codes, and Finding Comorbidities

Description Usage Arguments Value Functions

Codes provided are compared to the most recent version of the CMS list of billable codes, or another version if specified.

icd9IsBillable(icd9, isShort = icd9GuessIsShort(icd9),
  version = getLatestBillableVersion())

icd9IsBillableShort(icd9Short, version = getLatestBillableVersion())

icd9IsBillableDecimal(icd9Decimal, version = getLatestBillableVersion())

icd9GetBillable(icd9, isShort = icd9GuessIsShort(icd9), invert = FALSE,
  version = getLatestBillableVersion())

icd9GetBillableShort(icd9Short, version = getLatestBillableVersion())

icd9GetBillableDecimal(icd9Decimal, version = getLatestBillableVersion())

icd9GetNonBillableShort(icd9Short, version = getLatestBillableVersion())

icd9GetNonBillableDecimal(icd9Decimal, version = getLatestBillableVersion())

icd9GetNonBillable(icd9, isShort = icd9GuessIsShort(icd9),
  version = getLatestBillableVersion())

`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.
`version`	single character string, default is "32" which is the latest release from CMS. Currently anything from "23" to "32" is accepted. Not numeric because there are possible cases with non-numeric names, e.g. revisions within one year, although none currently implemented.
`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"
`invert`	single logical value, if `TRUE`, then the non-billable codes are returned. For functions with logical result, just negate with `!`. Default is `FALSE`.

logical vector of same length as input

icd9IsBillableShort: Are the given short-form codes leaf (billable) codes in the hierarchy?
icd9IsBillableDecimal: Are the given decimal-form codes leaf (billable) codes in the hierarchy?
icd9GetBillable: Return only those codes which are leaf (billable) codes in the hierarchy.
icd9GetBillableShort: Return only those short-form codes which are leaf (billable) codes in the hierarchy.
icd9GetBillableDecimal: Return only those decimal-form codes which are leaf (billable) codes in the hierarchy.
icd9GetNonBillableShort: Return only those short-form codes which are not leaf (billable) codes in the hierarchy. This would include invalid and heading codes.
icd9GetNonBillableDecimal: Return only those decimal-form codes which are not leaf (billable) codes in the hierarchy. This would include invalid and heading codes.
icd9GetNonBillable: Return only those codes which are not leaf (billable) codes in the hierarchy. This would include invalid and heading codes. Codes are specified (or guessed) to be all decimal- or short-form.