2020 ICD-10-CM Codes for Internal derangement of knee (M23)

Instructional Notations

Type 1 Excludes Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • 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
    • ICD-10 Index

      • Diseases of the musculoskeletal system and connective tissue (M00–M99)

        • Other joint disorders (M20-M25)

            • Internal derangement of knee (M23)
            • M23 - Internal derangement of knee NON-BILLABLE CODE
            • M23.0 - Cystic meniscus NON-BILLABLE CODE
            • M23.00 - Cystic meniscus, unspecified meniscus NON-BILLABLE CODE
            • M23.000 - Cystic meniscus, unspecified lateral meniscus, right knee BILLABLE CODE
            • M23.001 - Cystic meniscus, unspecified lateral meniscus, left knee BILLABLE CODE
            • M23.002 - Cystic meniscus, unsp lateral meniscus, unspecified knee BILLABLE CODE
            • M23.003 - Cystic meniscus, unspecified medial meniscus, right knee BILLABLE CODE
            • M23.004 - Cystic meniscus, unspecified medial meniscus, left knee BILLABLE CODE
            • M23.005 - Cystic meniscus, unsp medial meniscus, unspecified knee BILLABLE CODE
            • M23.006 - Cystic meniscus, unspecified meniscus, right knee BILLABLE CODE
            • M23.007 - Cystic meniscus, unspecified meniscus, left knee BILLABLE CODE
            • M23.009 - Cystic meniscus, unspecified meniscus, unspecified knee BILLABLE CODE
            • M23.01 - Cystic meniscus, anterior horn of medial meniscus NON-BILLABLE CODE
            • M23.011 - Cystic meniscus, anterior horn of medial meniscus, r knee BILLABLE CODE
            • M23.012 - Cystic meniscus, anterior horn of medial meniscus, left knee BILLABLE CODE
            • M23.019 - Cystic meniscus, anterior horn of medial meniscus, unsp knee BILLABLE CODE
            • M23.02 - Cystic meniscus, posterior horn of medial meniscus NON-BILLABLE CODE
            • M23.021 - Cystic meniscus, posterior horn of medial meniscus, r knee BILLABLE CODE
            • M23.022 - Cystic meniscus, posterior horn of medial meniscus, l knee BILLABLE CODE
            • M23.029 - Cystic meniscus, post horn of medial meniscus, unsp knee BILLABLE CODE
            • M23.03 - Cystic meniscus, other medial meniscus NON-BILLABLE CODE
            • M23.031 - Cystic meniscus, other medial meniscus, right knee BILLABLE CODE
            • M23.032 - Cystic meniscus, other medial meniscus, left knee BILLABLE CODE
            • M23.039 - Cystic meniscus, other medial meniscus, unspecified knee BILLABLE CODE
            • M23.04 - Cystic meniscus, anterior horn of lateral meniscus NON-BILLABLE CODE
            • M23.041 - Cystic meniscus, anterior horn of lat mensc, right knee BILLABLE CODE
            • M23.042 - Cystic meniscus, anterior horn of lat mensc, left knee BILLABLE CODE
            • M23.049 - Cystic meniscus, anterior horn of lat mensc, unsp knee BILLABLE CODE
            • M23.05 - Cystic meniscus, posterior horn of lateral meniscus NON-BILLABLE CODE
            • M23.051 - Cystic meniscus, posterior horn of lat mensc, right knee BILLABLE CODE
            • M23.052 - Cystic meniscus, posterior horn of lat mensc, left knee BILLABLE CODE
            • M23.059 - Cystic meniscus, posterior horn of lat mensc, unsp knee BILLABLE CODE
            • M23.06 - Cystic meniscus, other lateral meniscus NON-BILLABLE CODE
            • M23.061 - Cystic meniscus, other lateral meniscus, right knee BILLABLE CODE
            • M23.062 - Cystic meniscus, other lateral meniscus, left knee BILLABLE CODE
            • M23.069 - Cystic meniscus, other lateral meniscus, unspecified knee BILLABLE CODE
            • M23.2 - Derangement of meniscus due to old tear or injury NON-BILLABLE CODE
            • M23.20 - Derangement of unsp meniscus due to old tear or injury NON-BILLABLE CODE
            • M23.200 - Derang of unsp lat mensc due to old tear/inj, right knee BILLABLE CODE
            • M23.201 - Derangement of unsp lat mensc due to old tear/inj, left knee BILLABLE CODE
            • M23.202 - Derangement of unsp lat mensc due to old tear/inj, unsp knee BILLABLE CODE
            • M23.203 - Derang of unsp medial meniscus due to old tear/inj, r knee BILLABLE CODE
            • M23.204 - Derang of unsp medial meniscus due to old tear/inj, l knee BILLABLE CODE
            • M23.205 - Derang of unsp medial mensc due to old tear/inj, unsp knee BILLABLE CODE
            • M23.206 - Derangement of unsp meniscus due to old tear/inj, right knee BILLABLE CODE
            • M23.207 - Derangement of unsp meniscus due to old tear/inj, left knee BILLABLE CODE
            • M23.209 - Derangement of unsp meniscus due to old tear/inj, unsp knee BILLABLE CODE
            • M23.21 - Derang of ant horn of medial meniscus due to old tear/inj NON-BILLABLE CODE
            • M23.211 - Derang of ant horn of medial mensc d/t old tear/inj, r knee BILLABLE CODE
            • M23.212 - Derang of ant horn of medial mensc d/t old tear/inj, l knee BILLABLE CODE
            • M23.219 - Derang of ant horn of med mensc d/t old tear/inj, unsp knee BILLABLE CODE
            • M23.22 - Derang of post horn of medial meniscus due to old tear/inj NON-BILLABLE CODE
            • M23.221 - Derang of post horn of medial mensc d/t old tear/inj, r knee BILLABLE CODE
            • M23.222 - Derang of post horn of medial mensc d/t old tear/inj, l knee BILLABLE CODE
            • M23.229 - Derang of post horn of med mensc d/t old tear/inj, unsp knee BILLABLE CODE
            • M23.23 - Derangement of oth medial meniscus due to old tear or injury NON-BILLABLE CODE
            • M23.231 - Derang of medial meniscus due to old tear/inj, right knee BILLABLE CODE
            • M23.232 - Derang of medial meniscus due to old tear/inj, left knee BILLABLE CODE
            • M23.239 - Derang of medial meniscus due to old tear/inj, unsp knee BILLABLE CODE
            • M23.24 - Derang of anterior horn of lat mensc due to old tear/inj NON-BILLABLE CODE
            • M23.241 - Derang of ant horn of lat mensc due to old tear/inj, r knee BILLABLE CODE
            • M23.242 - Derang of ant horn of lat mensc due to old tear/inj, l knee BILLABLE CODE
            • M23.249 - Derang of ant horn of lat mensc d/t old tear/inj, unsp knee BILLABLE CODE
            • M23.25 - Derang of posterior horn of lat mensc due to old tear/inj NON-BILLABLE CODE
            • M23.251 - Derang of post horn of lat mensc due to old tear/inj, r knee BILLABLE CODE
            • M23.252 - Derang of post horn of lat mensc due to old tear/inj, l knee BILLABLE CODE
            • M23.259 - Derang of post horn of lat mensc d/t old tear/inj, unsp knee BILLABLE CODE
            • M23.26 - Derangement of lateral meniscus due to old tear or injury NON-BILLABLE CODE
            • M23.261 - Derangement of lat mensc due to old tear/inj, right knee BILLABLE CODE
            • M23.262 - Derangement of lat mensc due to old tear/inj, left knee BILLABLE CODE
            • M23.269 - Derangement of lat mensc due to old tear/inj, unsp knee BILLABLE CODE
            • M23.3 - Other meniscus derangements NON-BILLABLE CODE
            • M23.30 - Other meniscus derangements, unspecified meniscus NON-BILLABLE CODE
            • M23.300 - Oth meniscus derangements, unsp lateral meniscus, right knee BILLABLE CODE
            • M23.301 - Oth meniscus derangements, unsp lateral meniscus, left knee BILLABLE CODE
            • M23.302 - Oth meniscus derangements, unsp lateral meniscus, unsp knee BILLABLE CODE
            • M23.303 - Oth meniscus derangements, unsp medial meniscus, right knee BILLABLE CODE
            • M23.304 - Other meniscus derangements, unsp medial meniscus, left knee BILLABLE CODE
            • M23.305 - Other meniscus derangements, unsp medial meniscus, unsp knee BILLABLE CODE
            • M23.306 - Other meniscus derangements, unsp meniscus, right knee BILLABLE CODE
            • M23.307 - Other meniscus derangements, unspecified meniscus, left knee BILLABLE CODE
            • M23.309 - Other meniscus derangements, unsp meniscus, unspecified knee BILLABLE CODE
            • M23.31 - Oth meniscus derangements, anterior horn of medial meniscus NON-BILLABLE CODE
            • M23.311 - Oth meniscus derang, ant horn of medial meniscus, r knee BILLABLE CODE
            • M23.312 - Oth meniscus derang, ant horn of medial meniscus, l knee BILLABLE CODE
            • M23.319 - Oth meniscus derang, ant horn of medial meniscus, unsp knee BILLABLE CODE
            • M23.32 - Oth meniscus derangements, posterior horn of medial meniscus NON-BILLABLE CODE
            • M23.321 - Oth meniscus derang, post horn of medial meniscus, r knee BILLABLE CODE
            • M23.322 - Oth meniscus derang, post horn of medial meniscus, l knee BILLABLE CODE
            • M23.329 - Oth meniscus derang, post horn of medial meniscus, unsp knee BILLABLE CODE
            • M23.33 - Other meniscus derangements, other medial meniscus NON-BILLABLE CODE
            • M23.331 - Oth meniscus derangements, other medial meniscus, right knee BILLABLE CODE
            • M23.332 - Oth meniscus derangements, other medial meniscus, left knee BILLABLE CODE
            • M23.339 - Oth meniscus derangements, other medial meniscus, unsp knee BILLABLE CODE
            • M23.34 - Oth meniscus derangements, anterior horn of lateral meniscus NON-BILLABLE CODE
            • M23.341 - Oth meniscus derang, anterior horn of lat mensc, right knee BILLABLE CODE
            • M23.342 - Oth meniscus derang, anterior horn of lat mensc, left knee BILLABLE CODE
            • M23.349 - Oth meniscus derang, anterior horn of lat mensc, unsp knee BILLABLE CODE
            • M23.35 - Oth meniscus derangements, posterior horn of lat mensc NON-BILLABLE CODE
            • M23.351 - Oth meniscus derang, posterior horn of lat mensc, right knee BILLABLE CODE
            • M23.352 - Oth meniscus derang, posterior horn of lat mensc, left knee BILLABLE CODE
            • M23.359 - Oth meniscus derang, posterior horn of lat mensc, unsp knee BILLABLE CODE
            • M23.36 - Other meniscus derangements, other lateral meniscus NON-BILLABLE CODE
            • M23.361 - Oth meniscus derangements, oth lateral meniscus, right knee BILLABLE CODE
            • M23.362 - Oth meniscus derangements, other lateral meniscus, left knee BILLABLE CODE
            • M23.369 - Oth meniscus derangements, other lateral meniscus, unsp knee BILLABLE CODE
            • M23.4 - Loose body in knee NON-BILLABLE CODE
            • M23.40 - Loose body in knee, unspecified knee BILLABLE CODE
            • M23.41 - Loose body in knee, right knee BILLABLE CODE
            • M23.42 - Loose body in knee, left knee BILLABLE CODE
            • M23.5 - Chronic instability of knee NON-BILLABLE CODE
            • M23.50 - Chronic instability of knee, unspecified knee BILLABLE CODE
            • M23.51 - Chronic instability of knee, right knee BILLABLE CODE
            • M23.52 - Chronic instability of knee, left knee BILLABLE CODE
            • M23.6 - Other spontaneous disruption of ligament(s) of knee NON-BILLABLE CODE
            • M23.60 - Other spontaneous disruption of unspecified ligament of knee NON-BILLABLE CODE
            • M23.601 - Other spontaneous disruption of unsp ligament of right knee BILLABLE CODE
            • M23.602 - Other spontaneous disruption of unsp ligament of left knee BILLABLE CODE
            • M23.609 - Other spontaneous disruption of unsp ligament of unsp knee BILLABLE CODE
            • M23.61 - Oth spon disruption of anterior cruciate ligament of knee NON-BILLABLE CODE
            • M23.611 - Oth spon disrupt of anterior cruciate ligament of right knee BILLABLE CODE
            • M23.612 - Oth spon disrupt of anterior cruciate ligament of left knee BILLABLE CODE
            • M23.619 - Oth spon disrupt of anterior cruciate ligament of unsp knee BILLABLE CODE
            • M23.62 - Oth spon disruption of posterior cruciate ligament of knee NON-BILLABLE CODE
            • M23.621 - Oth spon disrupt of posterior cruciate ligament of r knee BILLABLE CODE
            • M23.622 - Oth spon disrupt of posterior cruciate ligament of left knee BILLABLE CODE
            • M23.629 - Oth spon disrupt of posterior cruciate ligament of unsp knee BILLABLE CODE
            • M23.63 - Oth spon disruption of medial collateral ligament of knee NON-BILLABLE CODE
            • M23.631 - Oth spon disruption of medial collat ligament of right knee BILLABLE CODE
            • M23.632 - Oth spon disruption of medial collat ligament of left knee BILLABLE CODE
            • M23.639 - Oth spon disruption of medial collat ligament of unsp knee BILLABLE CODE
            • M23.64 - Oth spon disruption of lateral collateral ligament of knee NON-BILLABLE CODE
            • M23.641 - Oth spon disruption of lateral collat ligament of right knee BILLABLE CODE
            • M23.642 - Oth spon disruption of lateral collat ligament of left knee BILLABLE CODE
            • M23.649 - Oth spon disruption of lateral collat ligament of unsp knee BILLABLE CODE
            • M23.67 - Other spontaneous disruption of capsular ligament of knee NON-BILLABLE CODE
            • M23.671 - Oth spon disruption of capsular ligament of right knee BILLABLE CODE
            • M23.672 - Oth spontaneous disruption of capsular ligament of left knee BILLABLE CODE
            • M23.679 - Oth spontaneous disruption of capsular ligament of unsp knee BILLABLE CODE
            • M23.8 - Other internal derangements of knee NON-BILLABLE CODE
            • M23.8X - Other internal derangements of knee NON-BILLABLE CODE
            • M23.8X1 - Other internal derangements of right knee BILLABLE CODE
            • M23.8X2 - Other internal derangements of left knee BILLABLE CODE
            • M23.8X9 - Other internal derangements of unspecified knee BILLABLE CODE
            • M23.9 - Unspecified internal derangement of knee NON-BILLABLE CODE
            • M23.90 - Unspecified internal derangement of unspecified knee BILLABLE CODE
            • M23.91 - Unspecified internal derangement of right knee BILLABLE CODE
            • M23.92 - Unspecified internal derangement of left knee BILLABLE CODE