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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  • M11.80—

    Other specified crystal arthropathies, unspecified site

  • M11.811—

    Other specified crystal arthropathies, right shoulder

  • M11.812—

    Other specified crystal arthropathies, left shoulder

  • M11.819—

    Other specified crystal arthropathies, unspecified shoulder

  • M11.821—

    Other specified crystal arthropathies, right elbow

  • M11.822—

    Other specified crystal arthropathies, left elbow

  • M11.829—

    Other specified crystal arthropathies, unspecified elbow

  • M11.831—

    Other specified crystal arthropathies, right wrist

  • M11.832—

    Other specified crystal arthropathies, left wrist

  • M11.839—

    Other specified crystal arthropathies, unspecified wrist

  • M11.841—

    Other specified crystal arthropathies, right hand

  • M11.842—

    Other specified crystal arthropathies, left hand

  • M11.849—

    Other specified crystal arthropathies, unspecified hand

  • M11.851—

    Other specified crystal arthropathies, right hip

  • M11.852—

    Other specified crystal arthropathies, left hip

  • M11.859—

    Other specified crystal arthropathies, unspecified hip

  • M11.861—

    Other specified crystal arthropathies, right knee

  • M11.862—

    Other specified crystal arthropathies, left knee

  • M11.869—

    Other specified crystal arthropathies, unspecified knee

  • M11.871—

    Other specified crystal arthropathies, right ankle and foot

  • M11.872—

    Other specified crystal arthropathies, left ankle and foot

  • M11.879—

    Other specified crystal arthropathies, unspecified ankle and foot

  • M11.88—

    Other specified crystal arthropathies, vertebrae

  • M11.89—

    Other specified crystal arthropathies, multiple sites

  • M11.9—

    Crystal arthropathy, unspecified

  • M12.00—

    Chronic postrheumatic arthropathy [Jaccoud], unspecified site

  • M12.011—

    Chronic postrheumatic arthropathy [Jaccoud], right shoulder

  • M12.012—

    Chronic postrheumatic arthropathy [Jaccoud], left shoulder

  • M12.019—

    Chronic postrheumatic arthropathy [Jaccoud], unspecified shoulder

  • M12.021—

    Chronic postrheumatic arthropathy [Jaccoud], right elbow

  • M12.022—

    Chronic postrheumatic arthropathy [Jaccoud], left elbow

  • M12.029—

    Chronic postrheumatic arthropathy [Jaccoud], unspecified elbow

  • M12.031—

    Chronic postrheumatic arthropathy [Jaccoud], right wrist

  • M12.032—

    Chronic postrheumatic arthropathy [Jaccoud], left wrist

  • M12.039—

    Chronic postrheumatic arthropathy [Jaccoud], unspecified wrist

  • M12.041—

    Chronic postrheumatic arthropathy [Jaccoud], right hand

  • M12.042—

    Chronic postrheumatic arthropathy [Jaccoud], left hand

  • M12.049—

    Chronic postrheumatic arthropathy [Jaccoud], unspecified hand

  • M12.051—

    Chronic postrheumatic arthropathy [Jaccoud], right hip

  • M12.052—

    Chronic postrheumatic arthropathy [Jaccoud], left hip

  • M12.059—

    Chronic postrheumatic arthropathy [Jaccoud], unspecified hip

  • M12.061—

    Chronic postrheumatic arthropathy [Jaccoud], right knee

  • M12.062—

    Chronic postrheumatic arthropathy [Jaccoud], left knee

  • M12.069—

    Chronic postrheumatic arthropathy [Jaccoud], unspecified knee

  • M12.071—

    Chronic postrheumatic arthropathy [Jaccoud], right ankle and foot

  • M12.072—

    Chronic postrheumatic arthropathy [Jaccoud], left ankle and foot

  • M12.079—

    Chronic postrheumatic arthropathy [Jaccoud], unspecified ankle and foot

  • M12.08—

    Chronic postrheumatic arthropathy [Jaccoud], other specified site

  • M12.09—

    Chronic postrheumatic arthropathy [Jaccoud], multiple sites

  • M12.10—

    Kaschin-Beck disease, unspecified site

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