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Example of Hierarchical Organization in the International Classification of Diseases, Tenth Revision, Coding System
| Level | Code Range or Code | Description |
|---|---|---|
| 1 | M00–M99 | Diseases of the musculoskeletal system and connective tissue |
| 2 | M06 | Other rheumatoid arthritis |
| 3 | M06.0 | Rheumatoid arthritis without rheumatoid factor |
| 4 | M06.01 | Rheumatoid arthritis without rheumatoid factor, shoulder |
| 5 | M06.011 | Rheumatoid arthritis without rheumatoid factor, right shoulder |
