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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  • M12.319—

    Palindromic rheumatism, unspecified shoulder

  • M12.321—

    Palindromic rheumatism, right elbow

  • M12.322—

    Palindromic rheumatism, left elbow

  • M12.329—

    Palindromic rheumatism, unspecified elbow

  • M12.331—

    Palindromic rheumatism, right wrist

  • M12.332—

    Palindromic rheumatism, left wrist

  • M12.339—

    Palindromic rheumatism, unspecified wrist

  • M12.341—

    Palindromic rheumatism, right hand

  • M12.342—

    Palindromic rheumatism, left hand

  • M12.349—

    Palindromic rheumatism, unspecified hand

  • M12.351—

    Palindromic rheumatism, right hip

  • M12.352—

    Palindromic rheumatism, left hip

  • M12.359—

    Palindromic rheumatism, unspecified hip

  • M12.361—

    Palindromic rheumatism, right knee

  • M12.362—

    Palindromic rheumatism, left knee

  • M12.369—

    Palindromic rheumatism, unspecified knee

  • M12.371—

    Palindromic rheumatism, right ankle and foot

  • M12.372—

    Palindromic rheumatism, left ankle and foot

  • M12.379—

    Palindromic rheumatism, unspecified ankle and foot

  • M12.38—

    Palindromic rheumatism, other specified site

  • M12.39—

    Palindromic rheumatism, multiple sites

  • M12.40—

    Intermittent hydrarthrosis, unspecified site

  • M12.411—

    Intermittent hydrarthrosis, right shoulder

  • M12.412—

    Intermittent hydrarthrosis, left shoulder

  • M12.419—

    Intermittent hydrarthrosis, unspecified shoulder

  • M12.421—

    Intermittent hydrarthrosis, right elbow

  • M12.422—

    Intermittent hydrarthrosis, left elbow

  • M12.429—

    Intermittent hydrarthrosis, unspecified elbow

  • M12.431—

    Intermittent hydrarthrosis, right wrist

  • M12.432—

    Intermittent hydrarthrosis, left wrist

  • M12.439—

    Intermittent hydrarthrosis, unspecified wrist

  • M12.441—

    Intermittent hydrarthrosis, right hand

  • M12.442—

    Intermittent hydrarthrosis, left hand

  • M12.449—

    Intermittent hydrarthrosis, unspecified hand

  • M12.451—

    Intermittent hydrarthrosis, right hip

  • M12.452—

    Intermittent hydrarthrosis, left hip

  • M12.459—

    Intermittent hydrarthrosis, unspecified hip

  • M12.461—

    Intermittent hydrarthrosis, right knee

  • M12.462—

    Intermittent hydrarthrosis, left knee

  • M12.469—

    Intermittent hydrarthrosis, unspecified knee

  • M12.471—

    Intermittent hydrarthrosis, right ankle and foot

  • M12.472—

    Intermittent hydrarthrosis, left ankle and foot

  • M12.479—

    Intermittent hydrarthrosis, unspecified ankle and foot

  • M12.48—

    Intermittent hydrarthrosis, other site

  • M12.49—

    Intermittent hydrarthrosis, multiple sites

  • M12.50—

    Traumatic arthropathy, unspecified site

  • M12.511—

    Traumatic arthropathy, right shoulder

  • M12.512—

    Traumatic arthropathy, left shoulder

  • M12.519—

    Traumatic arthropathy, unspecified shoulder

  • M12.521—

    Traumatic arthropathy, right elbow

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