icd9 (version 1.3.1)

icd9DropLeadingZeroes: drop zero padding from decimal ICD-9 code.

Description

decimal form ICD-9 codes are not ambiguous if the leading zeroes are dropped. Some short-form ICD-9 codes would not be ambiguous, e.g. "1" but many would be problematic. This is the inverse of icd9AddLeadingZeroesDecimal.

Invalid codes have no guaranteed result, and may give NA, or a (possibly valid) code in repsonse.

Usage

icd9DropLeadingZeroes(icd9, isShort)
icd9DropLeadingZeroesDecimal(icd9Decimal)
icd9DropLeadingZeroesShort(icd9Short)
icd9DropLeadingZeroesMajor(major)

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".

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"

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"

Value

character vector of ICD-9 codes with extra zeroes dropped from major part

See Also

Other ICD-9 convert: icd9ChaptersToMap, icd9LongToWide, icd9PartsToShort, icd9WideToLong