icd9PrecedingMinors

icd9SubsequentMinors

character vector of 'minor' part of ICD-9 codes, i.e. that part
which falls after the decimal point, in decimal notation. (In 5 digit
notation, the 'major' part is be xyz, even when x and y are zero, thus the
last two characters represent the 'minor' part

minor

this is not simply numeric, since "4" is after "39" and "0" !=
  "00". Frustrating to have to do so much string manipulation, but, as I have
  learned, it is not possible to treat ICD-9 codes as numbers without risking
  ambiguity and subtle mistakes.

manip

internal

This package allows accurate manipulation, validation and
    comparison of ICD-9-CM (clinical modification) codes. Although ICD-9 codes
    appear numeric, this is not the case, since trailing zeroes, and a mixture
    of decimal and non-decimal "short" format codes exist. Tools to map ICD-9
    codes to co-morbidities are also provided, with mappings from Quan (Deyo
    and Elixhauser versions), Elixhauser and AHRQ included.

icd9SubsequentMinors: determine preceding or subsequent post-decimal parts of ICD9 codes

Description

Usage

Arguments

See Also