Disorders affecting predominantly peripheral (limb) joints
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Excludes: | joints of the spine
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M20 | Acquired deformities of fingers and toes | |||||||
Excludes: | acquired absence of fingers and toes
congenital: · absence of fingers and toes · deformities and malformations of fingers and toes |
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M20.0 | Deformity of finger(s) | |||||||
Boutonnière and swan-neck deformities
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Excludes: | clubbing of fingers
palmar fascial fibromatosis [Dupuytren] trigger finger |
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M20.1 | Hallux valgus (acquired) | |||||||
Bunion
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M20.2 | Hallux rigidus | |||||||
M20.3 | Other deformity of hallux (acquired) | |||||||
Hallux varus
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M20.4 | Other hammer toe(s) (acquired) | |||||||
M20.5 | Other deformities of toe(s) (acquired) | |||||||
M20.6 | Acquired deformity of toe(s), unspecified |
M21 | Other acquired deformities of limbs | |||||||
[See site code at the beginning of this chapter ] | ||||||||
Excludes: | acquired absence of limb
acquired deformities of fingers or toes congenital: · absence of limbs · deformities and malformations of limbs coxa plana |
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M21.0 | Valgus deformity, not elsewhere classified | |||||||
Excludes: | metatarsus valgus
talipes calcaneovalgus |
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M21.1 | Varus deformity, not elsewhere classified | |||||||
Excludes: | metatarsus varus
tibia vara |
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M21.2 | Flexion deformity | |||||||
M21.3 | Wrist or foot drop (acquired) | |||||||
M21.4 | Flat foot [pes planus] (acquired) | |||||||
Excludes: | congenital pes planus
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M21.5 | Acquired clawhand, clubhand, clawfoot and clubfoot | |||||||
Excludes: | clubfoot, not specified as acquired
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M21.6 | Other acquired deformities of ankle and foot | |||||||
Excludes: | deformities of toe (acquired)
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M21.7 | Unequal limb length (acquired) | |||||||
M21.8 | Other specified acquired deformities of limbs | |||||||
M21.9 | Acquired deformity of limb, unspecified |
M22 | Disorders of patella | |||||||
Excludes: | dislocation of patella
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M22.0 | Recurrent dislocation of patella | |||||||
M22.1 | Recurrent subluxation of patella | |||||||
M22.2 | Patellofemoral disorders | |||||||
M22.3 | Other derangements of patella | |||||||
M22.4 | Chondromalacia patellae | |||||||
M22.8 | Other disorders of patella | |||||||
M22.9 | Disorder of patella, unspecified |
M23 | Internal derangement of knee | |||||||||
The following supplementary subclassification to indicate the site of involvement is provided for optional use with appropriate subcategories in M23.-; see also note at the beginning of this chapter. | ||||||||||
0 | Multiple sites | |||||||||
1 | Anterior cruciate ligament or Anterior horn of medial meniscus | |||||||||
2 | Posterior cruciate ligament or Posterior horn of medial meniscus | |||||||||
3 | Medial collateral ligament or Other and unspecified medial meniscus | |||||||||
4 | Lateral collateral ligament or Anterior horn of lateral meniscus | |||||||||
5 | Posterior horn of lateral meniscus | |||||||||
6 | Other and unspecified lateral meniscus | |||||||||
7 | Capsular ligament | |||||||||
9 | Unspecified ligament or Unspecified meniscus | |||||||||
Excludes: | ankylosis
current injury - see injury to the knee and lower leg deformity of knee disorders of patella osteochondritis dissecans recurrent dislocation or subluxation · patella |
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M23.0 | Cystic meniscus | |||||||||
M23.1 | Discoid meniscus (congenital) | |||||||||
M23.2 | Derangement of meniscus due to old tear or injury | |||||||||
Old bucket-handle tear
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M23.3 | Other meniscus derangements | |||||||||
Degenerate
Detached Retained |
}
} } |
meniscus
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M23.4 | Loose body in knee | |||||||||
M23.5 | Chronic instability of knee | |||||||||
M23.6 | Other spontaneous disruption of ligament(s) of knee | |||||||||
M23.8 | Other internal derangements of knee | |||||||||
Laxity of ligament of knee
Snapping knee |
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M23.9 | Internal derangement of knee, unspecified |
M24 | Other specific joint derangements | |||||||
[See site code at the beginning of this chapter ] | ||||||||
Excludes: | current injury - see injury of joint by body region
ganglion snapping knee temporomandibular joint disorders |
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M24.0 | Loose body in joint | |||||||
Excludes: | loose body in knee
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M24.1 | Other articular cartilage disorders | |||||||
Excludes: | chondrocalcinosis
internal derangement of knee metastatic calcification ochronosis |
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M24.2 | Disorder of ligament | |||||||
Instability secondary to old ligament injury
Ligamentous laxity NOS |
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Excludes: | familial ligamentous laxity
knee |
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M24.3 | Pathological dislocation and subluxation of joint, not elsewhere classified | |||||||
Excludes: | dislocation or displacement of joint:
· congenital - see congenital malformations and deformations of the musculoskeletal system · current injury - see injury of joints and ligaments by body region · recurrent |
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M24.4 | Recurrent dislocation and subluxation of joint | |||||||
Excludes: | patella
vertebral subluxation |
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M24.5 | Contracture of joint | |||||||
Excludes: | acquired deformities of limbs
contracture of tendon (sheath) without contracture of joint Dupuytren's contracture |
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M24.6 | Ankylosis of joint | |||||||
Excludes: | spine
stiffness of joint without ankylosis |
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M24.7 | Protrusio acetabuli | |||||||
M24.8 | Other specific joint derangements, not elsewhere classified | |||||||
Irritable hip
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Excludes: | that involving iliotibial band syndrome
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M24.9 | Joint derangement, unspecified |
M25 | Other joint disorders, not elsewhere classified | |||||||
[See site code at the beginning of this chapter ] | ||||||||
Excludes: | abnormality of gait and mobility
calcification of: · bursa · shoulder (joint) · tendon deformities classified to M20-M21 difficulty in walking |
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M25.0 | Haemarthrosis | |||||||
Excludes: | current injury - see injury of joint by body region
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M25.1 | Fistula of joint | |||||||
M25.2 | Flail joint | |||||||
M25.3 | Other instability of joint | |||||||
Excludes: | instability of joint secondary to:
· old ligament injury · removal of joint prosthesis |
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M25.4 | Effusion of joint | |||||||
Excludes: | hydrarthrosis of yaws
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M25.5 | Pain in joint | |||||||
M25.6 | Stiffness of joint, not elsewhere classified | |||||||
M25.7 | Osteophyte | |||||||
M25.8 | Other specified joint disorders | |||||||
M25.9 | Joint disorder, unspecified |