The block M20–M25 of ICD-10 is titled “Other joint disorders”. It is part of Chapter XIII, Diseases of the musculoskeletal system and connective tissue, and holds 6 groups.
What M20–M25 excludes
Conditions that look similar but belong under another code.
- joints of the spine M40-M54
Codes in M20–M25
- M21.0Valgus deformity, not elsewhere classified
- M21.1Varus deformity, not elsewhere classified
- M21.2Flexion deformity
- M21.3Wrist or foot drop (acquired)
- M21.4Flat foot [pes planus] (acquired)
- M21.5Acquired clawhand, clubhand, clawfoot and clubfoot
- M21.6Other acquired deformities of ankle and foot
- M21.7Unequal limb length (acquired)
- M21.8Other specified acquired deformities of limbs
- M21.9Acquired deformity of limb, unspecified
- M23.0Cystic meniscus
- M23.1Discoid meniscus (congenital)
- M23.2Derangement of meniscus due to old tear or injury
- M23.3Other meniscus derangements
- M23.4Loose body in knee
- M23.5Chronic instability of knee
- M23.6Other spontaneous disruption of ligament(s) of knee
- M23.8Other internal derangements of knee
- M23.9Internal derangement of knee, unspecified
- M24.0Loose body in joint
- M24.1Other articular cartilage disorders
- M24.2Disorder of ligament
- M24.3Pathological dislocation and subluxation of joint, not elsewhere classified
- M24.4Recurrent dislocation and subluxation of joint
- M24.5Contracture of joint
- M24.6Ankylosis of joint
- M24.7Protrusio acetabuli
- M24.8Other specific joint derangements, not elsewhere classified
- M24.9Joint derangement, unspecified
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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