M18 is the ICD-10 code for Arthrosis of first carpometacarpal joint. It is a three-character category divided into 7 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block M15–M19 (Arthrosis) in Chapter XIII, Diseases of the musculoskeletal system and connective tissue.
- Code type
- Category (3 characters)
- Chapter
- XIII · M00–M99
- Classification
- WHO ICD-10, 2019 version
Subcodes of M18
- M18.0Primary arthrosis of first carpometacarpal joints, bilateral
- M18.1Other primary arthrosis of first carpometacarpal joint
- M18.2Post-traumatic arthrosis of first carpometacarpal joints, bilateral
- M18.3Other post-traumatic arthrosis of first carpometacarpal joint
- M18.4Other secondary arthrosis of first carpometacarpal joints, bilateral
- M18.5Other secondary arthrosis of first carpometacarpal joint
- M18.9Arthrosis of first carpometacarpal joint, unspecified
M18 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DM18Slidgigt i tommelfingers rodled
M18Peukalon kämmennivelen (CMC) nivelrikko
M18Rhizarthrose [Arthrose des Daumensattelgelenkes]
M18Arthrose de la première articulation carpo-métacarpienne
M18artrose van eerste carpometacarpale gewricht
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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