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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  • M19.09—

    Primary osteoarthritis, other specified site

  • M19.111—

    Post-traumatic osteoarthritis, right shoulder

  • M19.112—

    Post-traumatic osteoarthritis, left shoulder

  • M19.119—

    Post-traumatic osteoarthritis, unspecified shoulder

  • M19.121—

    Post-traumatic osteoarthritis, right elbow

  • M19.122—

    Post-traumatic osteoarthritis, left elbow

  • M19.129—

    Post-traumatic osteoarthritis, unspecified elbow

  • M19.131—

    Post-traumatic osteoarthritis, right wrist

  • M19.132—

    Post-traumatic osteoarthritis, left wrist

  • M19.139—

    Post-traumatic osteoarthritis, unspecified wrist

  • M19.141—

    Post-traumatic osteoarthritis, right hand

  • M19.142—

    Post-traumatic osteoarthritis, left hand

  • M19.149—

    Post-traumatic osteoarthritis, unspecified hand

  • M19.171—

    Post-traumatic osteoarthritis, right ankle and foot

  • M19.172—

    Post-traumatic osteoarthritis, left ankle and foot

  • M19.179—

    Post-traumatic osteoarthritis, unspecified ankle and foot

  • M19.19—

    Post-traumatic osteoarthritis, other specified site

  • M19.211—

    Secondary osteoarthritis, right shoulder

  • M19.212—

    Secondary osteoarthritis, left shoulder

  • M19.219—

    Secondary osteoarthritis, unspecified shoulder

  • M19.221—

    Secondary osteoarthritis, right elbow

  • M19.222—

    Secondary osteoarthritis, left elbow

  • M19.229—

    Secondary osteoarthritis, unspecified elbow

  • M19.231—

    Secondary osteoarthritis, right wrist

  • M19.232—

    Secondary osteoarthritis, left wrist

  • M19.239—

    Secondary osteoarthritis, unspecified wrist

  • M19.241—

    Secondary osteoarthritis, right hand

  • M19.242—

    Secondary osteoarthritis, left hand

  • M19.249—

    Secondary osteoarthritis, unspecified hand

  • M19.271—

    Secondary osteoarthritis, right ankle and foot

  • M19.272—

    Secondary osteoarthritis, left ankle and foot

  • M19.279—

    Secondary osteoarthritis, unspecified ankle and foot

  • M19.29—

    Secondary osteoarthritis, other specified site

  • M19.90—

    Unspecified osteoarthritis, unspecified site

  • M19.91—

    Primary osteoarthritis, unspecified site

  • M19.92—

    Post-traumatic osteoarthritis, unspecified site

  • M19.93—

    Secondary osteoarthritis, unspecified site

  • M1A.00—

    Idiopathic chronic gout, unspecified site

  • M1A.00X0—

    Idiopathic chronic gout, unspecified site, without tophus (tophi)

  • M1A.00X1—

    Idiopathic chronic gout, unspecified site, with tophus (tophi)

  • M1A.011—

    Idiopathic chronic gout, right shoulder

  • M1A.0110—

    Idiopathic chronic gout, right shoulder, without tophus (tophi)

  • M1A.0111—

    Idiopathic chronic gout, right shoulder, with tophus (tophi)

  • M1A.012—

    Idiopathic chronic gout, left shoulder

  • M1A.0120—

    Idiopathic chronic gout, left shoulder, without tophus (tophi)

  • M1A.0121—

    Idiopathic chronic gout, left shoulder, with tophus (tophi)

  • M1A.019—

    Idiopathic chronic gout, unspecified shoulder

  • M1A.0190—

    Idiopathic chronic gout, unspecified shoulder, without tophus (tophi)

  • M1A.0191—

    Idiopathic chronic gout, unspecified shoulder, with tophus (tophi)

  • M1A.021—

    Idiopathic chronic gout, right elbow

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