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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  • M23.031—

    Cystic meniscus, other medial meniscus, right knee

  • M23.032—

    Cystic meniscus, other medial meniscus, left knee

  • M23.039—

    Cystic meniscus, other medial meniscus, unspecified knee

  • M23.04—

    Cystic meniscus, anterior horn of lateral meniscus

  • M23.041—

    Cystic meniscus, anterior horn of lateral meniscus, right knee

  • M23.042—

    Cystic meniscus, anterior horn of lateral meniscus, left knee

  • M23.049—

    Cystic meniscus, anterior horn of lateral meniscus, unspecified knee

  • M23.05—

    Cystic meniscus, posterior horn of lateral meniscus

  • M23.051—

    Cystic meniscus, posterior horn of lateral meniscus, right knee

  • M23.052—

    Cystic meniscus, posterior horn of lateral meniscus, left knee

  • M23.059—

    Cystic meniscus, posterior horn of lateral meniscus, unspecified knee

  • M23.06—

    Cystic meniscus, other lateral meniscus

  • M23.061—

    Cystic meniscus, other lateral meniscus, right knee

  • M23.062—

    Cystic meniscus, other lateral meniscus, left knee

  • M23.069—

    Cystic meniscus, other lateral meniscus, unspecified knee

  • M23.2—

    Derangement of meniscus due to old tear or injury

  • M23.20—

    Derangement of unspecified meniscus due to old tear or injury

  • M23.200—

    Derangement of unspecified lateral meniscus due to old tear or injury, right knee

  • M23.201—

    Derangement of unspecified lateral meniscus due to old tear or injury, left knee

  • M23.202—

    Derangement of unspecified lateral meniscus due to old tear or injury, unspecified knee

  • M23.203—

    Derangement of unspecified medial meniscus due to old tear or injury, right knee

  • M23.204—

    Derangement of unspecified medial meniscus due to old tear or injury, left knee

  • M23.205—

    Derangement of unspecified medial meniscus due to old tear or injury, unspecified knee

  • M23.206—

    Derangement of unspecified meniscus due to old tear or injury, right knee

  • M23.207—

    Derangement of unspecified meniscus due to old tear or injury, left knee

  • M23.209—

    Derangement of unspecified meniscus due to old tear or injury, unspecified knee

  • M23.21—

    Derangement of anterior horn of medial meniscus due to old tear or injury

  • M23.211—

    Derangement of anterior horn of medial meniscus due to old tear or injury, right knee

  • M23.212—

    Derangement of anterior horn of medial meniscus due to old tear or injury, left knee

  • M23.219—

    Derangement of anterior horn of medial meniscus due to old tear or injury, unspecified knee

  • M23.22—

    Derangement of posterior horn of medial meniscus due to old tear or injury

  • M23.221—

    Derangement of posterior horn of medial meniscus due to old tear or injury, right knee

  • M23.222—

    Derangement of posterior horn of medial meniscus due to old tear or injury, left knee

  • M23.229—

    Derangement of posterior horn of medial meniscus due to old tear or injury, unspecified knee

  • M23.23—

    Derangement of other medial meniscus due to old tear or injury

  • M23.231—

    Derangement of other medial meniscus due to old tear or injury, right knee

  • M23.232—

    Derangement of other medial meniscus due to old tear or injury, left knee

  • M23.239—

    Derangement of other medial meniscus due to old tear or injury, unspecified knee

  • M23.24—

    Derangement of anterior horn of lateral meniscus due to old tear or injury

  • M23.241—

    Derangement of anterior horn of lateral meniscus due to old tear or injury, right knee

  • M23.242—

    Derangement of anterior horn of lateral meniscus due to old tear or injury, left knee

  • M23.249—

    Derangement of anterior horn of lateral meniscus due to old tear or injury, unspecified knee

  • M23.25—

    Derangement of posterior horn of lateral meniscus due to old tear or injury

  • M23.251—

    Derangement of posterior horn of lateral meniscus due to old tear or injury, right knee

  • M23.252—

    Derangement of posterior horn of lateral meniscus due to old tear or injury, left knee

  • M23.259—

    Derangement of posterior horn of lateral meniscus due to old tear or injury, unspecified knee

  • M23.26—

    Derangement of other lateral meniscus due to old tear or injury

  • M23.261—

    Derangement of other lateral meniscus due to old tear or injury, right knee

  • M23.262—

    Derangement of other lateral meniscus due to old tear or injury, left knee

  • M23.269—

    Derangement of other lateral meniscus due to old tear or injury, unspecified knee

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