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  3. Ch. M00-M99
  4. Sec. M20-M25
  5. Category M22
Category M22

Disorder of patella

Clinical Classification Guidelines

Specific Diagnosis Codes

Recurrent dislocation of patella
M22.0
Recurrent dislocation of patella, unspecified knee
M22.00
Recurrent dislocation of patella, right knee
M22.01
Recurrent dislocation of patella, left knee
M22.02
Recurrent subluxation of patella
M22.1
Recurrent subluxation of patella, unspecified knee
M22.10
Recurrent subluxation of patella, right knee
M22.11
Recurrent subluxation of patella, left knee
M22.12
Patellofemoral disorders
M22.2
Patellofemoral disorders
M22.2X
Patellofemoral disorders, right knee
M22.2X1
Patellofemoral disorders, left knee
M22.2X2
Patellofemoral disorders, unspecified knee
M22.2X9
Other derangements of patella
M22.3
Other derangements of patella
M22.3X
Other derangements of patella, right knee
M22.3X1
Other derangements of patella, left knee
M22.3X2
Other derangements of patella, unspecified knee
M22.3X9
Chondromalacia patellae
M22.4
Chondromalacia patellae, unspecified knee
M22.40
Chondromalacia patellae, right knee
M22.41
Chondromalacia patellae, left knee
M22.42
Other disorders of patella
M22.8
Other disorders of patella
M22.8X
Other disorders of patella, right knee
M22.8X1
Other disorders of patella, left knee
M22.8X2
Other disorders of patella, unspecified knee
M22.8X9
Unspecified disorder of patella
M22.9
Unspecified disorder of patella, unspecified knee
M22.90
Unspecified disorder of patella, right knee
M22.91
Unspecified disorder of patella, left knee
M22.92
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Data updated for October 2025 release.

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