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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  • M51.45—

    Schmorl's nodes, thoracolumbar region

  • M51.46—

    Schmorl's nodes, lumbar region

  • M51.47—

    Schmorl's nodes, lumbosacral region

  • M51.84—

    Other intervertebral disc disorders, thoracic region

  • M51.85—

    Other intervertebral disc disorders, thoracolumbar region

  • M51.86—

    Other intervertebral disc disorders, lumbar region

  • M51.87—

    Other intervertebral disc disorders, lumbosacral region

  • M51.9—

    Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder

  • M51.A0—

    Intervertebral annulus fibrosus defect, lumbar region, unspecified size

  • M51.A1—

    Intervertebral annulus fibrosus defect, small, lumbar region

  • M51.A2—

    Intervertebral annulus fibrosus defect, large, lumbar region

  • M51.A3—

    Intervertebral annulus fibrosus defect, lumbosacral region, unspecified size

  • M51.A4—

    Intervertebral annulus fibrosus defect, small, lumbosacral region

  • M51.A5—

    Intervertebral annulus fibrosus defect, large, lumbosacral region

  • M53.0—

    Cervicocranial syndrome

  • M53.1—

    Cervicobrachial syndrome

  • M53.2X1—

    Spinal instabilities, occipito-atlanto-axial region

  • M53.2X2—

    Spinal instabilities, cervical region

  • M53.2X3—

    Spinal instabilities, cervicothoracic region

  • M53.2X4—

    Spinal instabilities, thoracic region

  • M53.2X5—

    Spinal instabilities, thoracolumbar region

  • M53.2X6—

    Spinal instabilities, lumbar region

  • M53.2X7—

    Spinal instabilities, lumbosacral region

  • M53.2X8—

    Spinal instabilities, sacral and sacrococcygeal region

  • M53.2X9—

    Spinal instabilities, site unspecified

  • M53.3—

    Sacrococcygeal disorders, not elsewhere classified

  • M53.80—

    Other specified dorsopathies, site unspecified

  • M53.81—

    Other specified dorsopathies, occipito-atlanto-axial region

  • M53.82—

    Other specified dorsopathies, cervical region

  • M53.83—

    Other specified dorsopathies, cervicothoracic region

  • M53.84—

    Other specified dorsopathies, thoracic region

  • M53.85—

    Other specified dorsopathies, thoracolumbar region

  • M53.86—

    Other specified dorsopathies, lumbar region

  • M53.87—

    Other specified dorsopathies, lumbosacral region

  • M53.88—

    Other specified dorsopathies, sacral and sacrococcygeal region

  • M53.9—

    Dorsopathy, unspecified

  • M54.00—

    Panniculitis affecting regions of neck and back, site unspecified

  • M54.01—

    Panniculitis affecting regions of neck and back, occipito-atlanto-axial region

  • M54.02—

    Panniculitis affecting regions of neck and back, cervical region

  • M54.03—

    Panniculitis affecting regions of neck and back, cervicothoracic region

  • M54.04—

    Panniculitis affecting regions of neck and back, thoracic region

  • M54.05—

    Panniculitis affecting regions of neck and back, thoracolumbar region

  • M54.06—

    Panniculitis affecting regions of neck and back, lumbar region

  • M54.07—

    Panniculitis affecting regions of neck and back, lumbosacral region

  • M54.08—

    Panniculitis affecting regions of neck and back, sacral and sacrococcygeal region

  • M54.09—

    Panniculitis affecting regions, neck and back, multiple sites in spine

  • M54.10—

    Radiculopathy, site unspecified

  • M54.11—

    Radiculopathy, occipito-atlanto-axial region

  • M54.12—

    Radiculopathy, cervical region

  • M54.13—

    Radiculopathy, cervicothoracic region

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