All ICD10 Codes
Chapter 13

M00–M99: Diseases of the Musculoskeletal System and Connective Tissue

Diseases of the Musculoskeletal System and Connective Tissue diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
All CodesBillable Only
Internal Codes
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  • M23.3—

    Other meniscus derangements

  • M23.30—

    Other meniscus derangements, unspecified meniscus

  • M23.300—

    Other meniscus derangements, unspecified lateral meniscus, right knee

  • M23.301—

    Other meniscus derangements, unspecified lateral meniscus, left knee

  • M23.302—

    Other meniscus derangements, unspecified lateral meniscus, unspecified knee

  • M23.303—

    Other meniscus derangements, unspecified medial meniscus, right knee

  • M23.304—

    Other meniscus derangements, unspecified medial meniscus, left knee

  • M23.305—

    Other meniscus derangements, unspecified medial meniscus, unspecified knee

  • M23.306—

    Other meniscus derangements, unspecified meniscus, right knee

  • M23.307—

    Other meniscus derangements, unspecified meniscus, left knee

  • M23.309—

    Other meniscus derangements, unspecified meniscus, unspecified knee

  • M23.31—

    Other meniscus derangements, anterior horn of medial meniscus

  • M23.311—

    Other meniscus derangements, anterior horn of medial meniscus, right knee

  • M23.312—

    Other meniscus derangements, anterior horn of medial meniscus, left knee

  • M23.319—

    Other meniscus derangements, anterior horn of medial meniscus, unspecified knee

  • M23.32—

    Other meniscus derangements, posterior horn of medial meniscus

  • M23.321—

    Other meniscus derangements, posterior horn of medial meniscus, right knee

  • M23.322—

    Other meniscus derangements, posterior horn of medial meniscus, left knee

  • M23.329—

    Other meniscus derangements, posterior horn of medial meniscus, unspecified knee

  • M23.33—

    Other meniscus derangements, other medial meniscus

  • M23.331—

    Other meniscus derangements, other medial meniscus, right knee

  • M23.332—

    Other meniscus derangements, other medial meniscus, left knee

  • M23.339—

    Other meniscus derangements, other medial meniscus, unspecified knee

  • M23.34—

    Other meniscus derangements, anterior horn of lateral meniscus

  • M23.341—

    Other meniscus derangements, anterior horn of lateral meniscus, right knee

  • M23.342—

    Other meniscus derangements, anterior horn of lateral meniscus, left knee

  • M23.349—

    Other meniscus derangements, anterior horn of lateral meniscus, unspecified knee

  • M23.35—

    Other meniscus derangements, posterior horn of lateral meniscus

  • M23.351—

    Other meniscus derangements, posterior horn of lateral meniscus, right knee

  • M23.352—

    Other meniscus derangements, posterior horn of lateral meniscus, left knee

  • M23.359—

    Other meniscus derangements, posterior horn of lateral meniscus, unspecified knee

  • M23.36—

    Other meniscus derangements, other lateral meniscus

  • M23.361—

    Other meniscus derangements, other lateral meniscus, right knee

  • M23.362—

    Other meniscus derangements, other lateral meniscus, left knee

  • M23.369—

    Other meniscus derangements, other lateral meniscus, unspecified knee

  • M23.4—

    Loose body in knee

  • M23.40—

    Loose body in knee, unspecified knee

  • M23.41—

    Loose body in knee, right knee

  • M23.42—

    Loose body in knee, left knee

  • M23.5—

    Chronic instability of knee

  • M23.50—

    Chronic instability of knee, unspecified knee

  • M23.51—

    Chronic instability of knee, right knee

  • M23.52—

    Chronic instability of knee, left knee

  • M23.6—

    Other spontaneous disruption of ligament(s) of knee

  • M23.60—

    Other spontaneous disruption of unspecified ligament of knee

  • M23.601—

    Other spontaneous disruption of unspecified ligament of right knee

  • M23.602—

    Other spontaneous disruption of unspecified ligament of left knee

  • M23.609—

    Other spontaneous disruption of unspecified ligament of unspecified knee

  • M23.61—

    Other spontaneous disruption of anterior cruciate ligament of knee

  • M23.611—

    Other spontaneous disruption of anterior cruciate ligament of right knee

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