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3x9 Other derangements of patella, unspecified knee
- M22.4 Chondromalacia patellae
- M22.40 Chondromalacia patellae, unspecified knee
- M22.41 Chondromalacia patellae, right knee
- M22.42 Chondromalacia patellae, left knee
- M22.8 Other disorders of patella
- M22.8x Other disorders of patella
- M22.8x1 Other disorders of patella, right knee
- M22.8x2 Other disorders of patella, left knee
- M22.8x9 Other disorders of patella, unspecified knee
- M22.8x Other disorders of patella
- M22.9 Unspecified disorder of patella
- M22.90 Unspecified disorder of patella, unspecified knee
- M22.91 Unspecified disorder of patella, right knee
- M22.92 Unspecified disorder of patella, left knee
M23 Internal derangement of knee
- Excludes1: ankylosis (M24.66)
- current injury - see injury of knee and lower leg (S80-S89)
- deformity of knee (M21.-)
- osteochondritis dissecans (M93.2)
- recurrent dislocation or subluxation of joints (M24.4)
- recurrent dislocation or subluxation of patella (M22.0-M22.1)
- M23.0 Cystic meniscus
- M23.00 Cystic meniscus, unspecified meniscus
- Cystic meniscus, unspecified lateral meniscus
- Cystic meniscus, unspecified medial meniscus
- M23.000 Cystic meniscus, unspecified lateral meniscus, right knee
- M23.001 Cystic meniscus, unspecified lateral meniscus, left knee
- M23.002 Cystic meniscus, unspecified lateral meniscus, unspecified knee
- M23.003 Cystic meniscus, unspecified medial meniscus, right knee
- M23.004 Cystic meniscus, unspecified medial meniscus, left knee
- M23.005 Cystic meniscus, unspecified medial meniscus, unspecified knee
- M23.006 Cystic meniscus, unspecified meniscus, right knee
- M23.007 Cystic meniscus, unspecified meniscus, left knee
- M23.009 Cystic meniscus, unspecified meniscus, unspecified knee
- M23.01 Cystic meniscus, anterior horn of medial meniscus
- M23.
- M23.00 Cystic meniscus, unspecified meniscus
