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ICD 9 procedure codes do not look like they follow the convention outlined in https://cran.r-project.org/web/packages/pccc/vignettes/pccc-overview.html Codes < 10 should be front padded with "00" and codes < 100 should be padded with "0". But, e.g. code 06.4 (endocrine disorders) was listed as 064 (so matches 64.0 = circumcision). Will fix others in future commit
dewittpe
reviewed
Jan 6, 2026
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| pc_neuromusc = {"0152","0153","0221","0222","0231","0232","0233","0234","0235","0239","0241", | ||
| "0242","0293","0371","0372","0379","0393","0397","0492"}; | ||
| pc_neuromusc = {"00152","00153","00221","00222","00231","00232","00233","00234","00235","00239","00241", |
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ICD-9 Procedure codes are a maximum of four digits. 00152 is not a valid ICD-9 procedure code, 0152 is a valid code. specifically, this is 01.52 which is a Hemispherectomy.
dewittpe
reviewed
Jan 6, 2026
| "4432","4438","4439","4563","4581","4582","4583","4613","4622","4623","4632","4640","4641", | ||
| "4643","4697","504", "5051","5059","526","527","5280","5282","5283","5284","5285","5286", | ||
| "5471","9624","9636","9702"}; | ||
| pc_gi = {"0253","0254","04210","04211","04242","04281","04311","04319","04391","04399","04412", |
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The leading zero for 253 is an error.
First, the compact ICD-9 procedure code 253 expands to 25.3 as the full code which is a "complete glossectomy" and maps to a gi issue.
a compact code of the form 0253 would expand to the full form of 02.53 which is not a known ICD-9 procedure code.
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#41
Padded the ICD9 procedure codes (
src/pccc.cpp) in accordance with the documentation