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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  • M99.21—

    Subluxation stenosis of neural canal of cervical region

  • M99.22—

    Subluxation stenosis of neural canal of thoracic region

  • M99.23—

    Subluxation stenosis of neural canal of lumbar region

  • M99.24—

    Subluxation stenosis of neural canal of sacral region

  • M99.25—

    Subluxation stenosis of neural canal of pelvic region

  • M99.26—

    Subluxation stenosis of neural canal of lower extremity

  • M99.27—

    Subluxation stenosis of neural canal of upper extremity

  • M99.28—

    Subluxation stenosis of neural canal of rib cage

  • M99.29—

    Subluxation stenosis of neural canal of abdomen and other regions

  • M99.30—

    Osseous stenosis of neural canal of head region

  • M99.31—

    Osseous stenosis of neural canal of cervical region

  • M99.32—

    Osseous stenosis of neural canal of thoracic region

  • M99.33—

    Osseous stenosis of neural canal of lumbar region

  • M99.34—

    Osseous stenosis of neural canal of sacral region

  • M99.35—

    Osseous stenosis of neural canal of pelvic region

  • M99.36—

    Osseous stenosis of neural canal of lower extremity

  • M99.37—

    Osseous stenosis of neural canal of upper extremity

  • M99.38—

    Osseous stenosis of neural canal of rib cage

  • M99.39—

    Osseous stenosis of neural canal of abdomen and other regions

  • M99.40—

    Connective tissue stenosis of neural canal of head region

  • M99.41—

    Connective tissue stenosis of neural canal of cervical region

  • M99.42—

    Connective tissue stenosis of neural canal of thoracic region

  • M99.43—

    Connective tissue stenosis of neural canal of lumbar region

  • M99.44—

    Connective tissue stenosis of neural canal of sacral region

  • M99.45—

    Connective tissue stenosis of neural canal of pelvic region

  • M99.46—

    Connective tissue stenosis of neural canal of lower extremity

  • M99.47—

    Connective tissue stenosis of neural canal of upper extremity

  • M99.48—

    Connective tissue stenosis of neural canal of rib cage

  • M99.49—

    Connective tissue stenosis of neural canal of abdomen and other regions

  • M99.50—

    Intervertebral disc stenosis of neural canal of head region

  • M99.51—

    Intervertebral disc stenosis of neural canal of cervical region

  • M99.52—

    Intervertebral disc stenosis of neural canal of thoracic region

  • M99.53—

    Intervertebral disc stenosis of neural canal of lumbar region

  • M99.54—

    Intervertebral disc stenosis of neural canal of sacral region

  • M99.55—

    Intervertebral disc stenosis of neural canal of pelvic region

  • M99.56—

    Intervertebral disc stenosis of neural canal of lower extremity

  • M99.57—

    Intervertebral disc stenosis of neural canal of upper extremity

  • M99.58—

    Intervertebral disc stenosis of neural canal of rib cage

  • M99.59—

    Intervertebral disc stenosis of neural canal of abdomen and other regions

  • M99.60—

    Osseous and subluxation stenosis of intervertebral foramina of head region

  • M99.61—

    Osseous and subluxation stenosis of intervertebral foramina of cervical region

  • M99.62—

    Osseous and subluxation stenosis of intervertebral foramina of thoracic region

  • M99.63—

    Osseous and subluxation stenosis of intervertebral foramina of lumbar region

  • M99.64—

    Osseous and subluxation stenosis of intervertebral foramina of sacral region

  • M99.65—

    Osseous and subluxation stenosis of intervertebral foramina of pelvic region

  • M99.66—

    Osseous and subluxation stenosis of intervertebral foramina of lower extremity

  • M99.67—

    Osseous and subluxation stenosis of intervertebral foramina of upper extremity

  • M99.68—

    Osseous and subluxation stenosis of intervertebral foramina of rib cage

  • M99.69—

    Osseous and subluxation stenosis of intervertebral foramina of abdomen and other regions

  • M99.70—

    Connective tissue and disc stenosis of intervertebral foramina of head region

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