icd9_expand_range_worker

Expands a range of short ICD-9 codes, dropping ambiguous codes in the middle
of ranges

internal

Calculate comorbidities, Charlson and van Walraven
scores, perform fast and accurate validation, conversion,
manipulation, filtering and comparison of ICD-9 and ICD-10 codes. This
package enables a work flow from raw lists of ICD codes in hospital
databases to comorbidities.  ICD-9 and ICD-10 comorbidity mappings
from Quan (Deyo and Elixhauser versions), Elixhauser and AHRQ
included.  Common ambiguities and code formats are handled.

Jack O Wasey

Comorbidity Calculations and Tools for ICD-9 and ICD-10 Codes

Jack O. Wasey

William Murphy

Anobel Odisho

Vitaly Druker

Ed Lee

icd9_expand_range_worker function

At the end of the output, we may
 not want any higher-level codes at the end which would have children beyond
 the specified range. There could be lots of lower level codes at the end,
 so we actually have to search the whole list to be sure. One parent code
 could have maximum of 110 child codes, so we just search the last 110
 (TODO). This means that even if trying to preserve the ambiguous start,
 setting <code>ex_ambig_end</code> will have to kill it, if it spills over.

Ambiguous terminal parent codes

Excluding ambiguous parent codes
 from the start is easier than those near the end of the result. Just remove
 those codes at the beginning which have children not in the output let us
 take the first 5, to cover cases like 100, 101, 102.1, 102.11, 102.2. There
 are only so many ways for parent codes to appear (assuming the input vector
 is ordered)

icd9_expand_range_worker: expand range worker

Description

Usage

Arguments

Ambiguous terminal parent codes

Ambiguous starting parent codes