Excludes2

  1. M22 Disorder of patella

    1. M22.0 Recurrent dislocation of patella

      1. M22.00 Recurrent dislocation of patella, unspecified knee

      2. M22.01 Recurrent dislocation of patella, right knee

      3. M22.02 Recurrent dislocation of patella, left knee

    2. M22.1 Recurrent subluxation of patella

      Inclusion term(s):

      • Incomplete dislocation of patella
      1. M22.10 Recurrent subluxation of patella, unspecified knee

      2. M22.11 Recurrent subluxation of patella, right knee

      3. M22.12 Recurrent subluxation of patella, left knee

    3. M22.2 Patellofemoral disorders

      1. M22.2X Patellofemoral disorders

        • M22.2X1 Patellofemoral disorders, right knee
        • M22.2X2 Patellofemoral disorders, left knee
        • M22.2X9 Patellofemoral disorders, unspecified knee
    4. M22.3 Other derangements of patella

      1. M22.3X Other derangements of patella

        • M22.3X1 Other derangements of patella, right knee
        • M22.3X2 Other derangements of patella, left knee
        • M22.3X9 Other derangements of patella, unspecified knee
    5. M22.4 Chondromalacia patellae

      1. M22.40 Chondromalacia patellae, unspecified knee

      2. M22.41 Chondromalacia patellae, right knee

      3. M22.42 Chondromalacia patellae, left knee

    6. M22.8 Other disorders of patella

      1. 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
    7. M22.9 Unspecified disorder of patella

      1. M22.90 Unspecified disorder of patella, unspecified knee

      2. M22.91 Unspecified disorder of patella, right knee

      3. M22.92 Unspecified disorder of patella, left knee

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.