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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  • M18.52—

    Other unilateral secondary osteoarthritis of first carpometacarpal joint, left hand

  • M18.9—

    Osteoarthritis of first carpometacarpal joint, unspecified

  • M19—

    Other and unspecified osteoarthritis

  • M19.0—

    Primary osteoarthritis of other joints

  • M19.01—

    Primary osteoarthritis, shoulder

  • M19.011—

    Primary osteoarthritis, right shoulder

  • M19.012—

    Primary osteoarthritis, left shoulder

  • M19.019—

    Primary osteoarthritis, unspecified shoulder

  • M19.02—

    Primary osteoarthritis, elbow

  • M19.021—

    Primary osteoarthritis, right elbow

  • M19.022—

    Primary osteoarthritis, left elbow

  • M19.029—

    Primary osteoarthritis, unspecified elbow

  • M19.03—

    Primary osteoarthritis, wrist

  • M19.031—

    Primary osteoarthritis, right wrist

  • M19.032—

    Primary osteoarthritis, left wrist

  • M19.039—

    Primary osteoarthritis, unspecified wrist

  • M19.04—

    Primary osteoarthritis, hand

  • M19.041—

    Primary osteoarthritis, right hand

  • M19.042—

    Primary osteoarthritis, left hand

  • M19.049—

    Primary osteoarthritis, unspecified hand

  • M19.07—

    Primary osteoarthritis ankle and foot

  • M19.071—

    Primary osteoarthritis, right ankle and foot

  • M19.072—

    Primary osteoarthritis, left ankle and foot

  • M19.079—

    Primary osteoarthritis, unspecified ankle and foot

  • M19.09—

    Primary osteoarthritis, other specified site

  • M19.1—

    Post-traumatic osteoarthritis of other joints

  • M19.11—

    Post-traumatic osteoarthritis, shoulder

  • M19.111—

    Post-traumatic osteoarthritis, right shoulder

  • M19.112—

    Post-traumatic osteoarthritis, left shoulder

  • M19.119—

    Post-traumatic osteoarthritis, unspecified shoulder

  • M19.12—

    Post-traumatic osteoarthritis, elbow

  • M19.121—

    Post-traumatic osteoarthritis, right elbow

  • M19.122—

    Post-traumatic osteoarthritis, left elbow

  • M19.129—

    Post-traumatic osteoarthritis, unspecified elbow

  • M19.13—

    Post-traumatic osteoarthritis, wrist

  • M19.131—

    Post-traumatic osteoarthritis, right wrist

  • M19.132—

    Post-traumatic osteoarthritis, left wrist

  • M19.139—

    Post-traumatic osteoarthritis, unspecified wrist

  • M19.14—

    Post-traumatic osteoarthritis, hand

  • M19.141—

    Post-traumatic osteoarthritis, right hand

  • M19.142—

    Post-traumatic osteoarthritis, left hand

  • M19.149—

    Post-traumatic osteoarthritis, unspecified hand

  • M19.17—

    Post-traumatic osteoarthritis, ankle and foot

  • 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

  • M19.2—

    Secondary osteoarthritis of other joints

  • M19.21—

    Secondary osteoarthritis, shoulder

  • M19.211—

    Secondary osteoarthritis, right shoulder

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