expand_range doesn't work for certain chapters

[zx8754]

See below:

# R version 4.2.2 (2022-10-31 ucrt)
# icd_4.0.9.9000
library(icd)
#get subchapters
sub_chap <- icd10_sub_chapters

This subchapter expands for range_major but not range: Disorders Of Thyroid Gland

x <- unlist(sub_chap[51])
# Disorders Of Thyroid Gland.start 
# "E00" 
# Disorders Of Thyroid Gland.end 
# "E07"
expand_range(x[1], x[2])
# Error in icd9_expand_range_short(start, end, defined, ex_ambig_start,  : 
#  is_defined(start, short_code = TRUE) is not TRUE

expand_range_major(x[1], x[2])
# [1] "E000" "E001" "E002" "E003" "E004" "E005" "E006" "E007"

This subchapter doesn't expand, gives same error: Pedestrian Injured In Transport Accident

x <- unlist(sub_chap[239])
# Pedestrian Injured In Transport Accident.start 
# "V00" 
# Pedestrian Injured In Transport Accident.end 
# "V09" 
expand_range(x[1], x[2])
expand_range_major(x[1], x[2])
# Error in guess_pair_version(start = start, end = end, short_code = short_code) : 
#   Cannot expand range because ICD code version cannot be guessed from V00 and V09. Either specify the classes, e.g. icd9("100.4"), or call the
# S3 method directly, e.g. expand_range.icd9

[jsavinc]

Hi, I think this is due to codes prefixed with E- and V- are also valid codes in ICD-9. Have you tried specifying the ICD version?