This is rather slow, queries a web page repeatedly, which is both non-reproducible, and perhaps bad form. Aim to deprecate and replace with my own RTF parsing of canonical documents, which is now working reasonably well, at least for 'major' codes from 2015.
1 | parseIcd9Chapters(year = NULL, save = FALSE)
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This is not almost obsolete. The only remaining use is the chapter and sub-chapter names and ranges, or validation.
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