icd9_chapters: ICD-9 chapters

Description

icd9_chapters, icd9_chapters_sub and icd9_majors contain mappings from the higher level descriptions of ICD-9 codes to the ranges of ICD-9 codes they describe. Helpful in summarizing codes or grouping for human-readable output. These can easily be converted to a co-morbidity mapping, as shown in the vignette.

Format

list with chapter/sub-chapter or major names stored in list names, each with two element named character vector with start and end codes.

Details

Source

http://www.cms.gov/Medicare/Coding/ICD9ProviderDiagnosticCodes/codes.html


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