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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  • M05.661—

    Rheumatoid arthritis of right knee with involvement of other organs and systems

  • M05.662—

    Rheumatoid arthritis of left knee with involvement of other organs and systems

  • M05.669—

    Rheumatoid arthritis of unspecified knee with involvement of other organs and systems

  • M05.671—

    Rheumatoid arthritis of right ankle and foot with involvement of other organs and systems

  • M05.672—

    Rheumatoid arthritis of left ankle and foot with involvement of other organs and systems

  • M05.679—

    Rheumatoid arthritis of unspecified ankle and foot with involvement of other organs and systems

  • M05.69—

    Rheumatoid arthritis of multiple sites with involvement of other organs and systems

  • M05.70—

    Rheumatoid arthritis with rheumatoid factor of unspecified site without organ or systems involvement

  • M05.711—

    Rheumatoid arthritis with rheumatoid factor of right shoulder without organ or systems involvement

  • M05.712—

    Rheumatoid arthritis with rheumatoid factor of left shoulder without organ or systems involvement

  • M05.719—

    Rheumatoid arthritis with rheumatoid factor of unspecified shoulder without organ or systems involvement

  • M05.721—

    Rheumatoid arthritis with rheumatoid factor of right elbow without organ or systems involvement

  • M05.722—

    Rheumatoid arthritis with rheumatoid factor of left elbow without organ or systems involvement

  • M05.729—

    Rheumatoid arthritis with rheumatoid factor of unspecified elbow without organ or systems involvement

  • M05.731—

    Rheumatoid arthritis with rheumatoid factor of right wrist without organ or systems involvement

  • M05.732—

    Rheumatoid arthritis with rheumatoid factor of left wrist without organ or systems involvement

  • M05.739—

    Rheumatoid arthritis with rheumatoid factor of unspecified wrist without organ or systems involvement

  • M05.741—

    Rheumatoid arthritis with rheumatoid factor of right hand without organ or systems involvement

  • M05.742—

    Rheumatoid arthritis with rheumatoid factor of left hand without organ or systems involvement

  • M05.749—

    Rheumatoid arthritis with rheumatoid factor of unspecified hand without organ or systems involvement

  • M05.751—

    Rheumatoid arthritis with rheumatoid factor of right hip without organ or systems involvement

  • M05.752—

    Rheumatoid arthritis with rheumatoid factor of left hip without organ or systems involvement

  • M05.759—

    Rheumatoid arthritis with rheumatoid factor of unspecified hip without organ or systems involvement

  • M05.761—

    Rheumatoid arthritis with rheumatoid factor of right knee without organ or systems involvement

  • M05.762—

    Rheumatoid arthritis with rheumatoid factor of left knee without organ or systems involvement

  • M05.769—

    Rheumatoid arthritis with rheumatoid factor of unspecified knee without organ or systems involvement

  • M05.771—

    Rheumatoid arthritis with rheumatoid factor of right ankle and foot without organ or systems involvement

  • M05.772—

    Rheumatoid arthritis with rheumatoid factor of left ankle and foot without organ or systems involvement

  • M05.779—

    Rheumatoid arthritis with rheumatoid factor of unspecified ankle and foot without organ or systems involvement

  • M05.79—

    Rheumatoid arthritis with rheumatoid factor of multiple sites without organ or systems involvement

  • M05.7A—

    Rheumatoid arthritis with rheumatoid factor of other specified site without organ or systems involvement

  • M05.80—

    Other rheumatoid arthritis with rheumatoid factor of unspecified site

  • M05.811—

    Other rheumatoid arthritis with rheumatoid factor of right shoulder

  • M05.812—

    Other rheumatoid arthritis with rheumatoid factor of left shoulder

  • M05.819—

    Other rheumatoid arthritis with rheumatoid factor of unspecified shoulder

  • M05.821—

    Other rheumatoid arthritis with rheumatoid factor of right elbow

  • M05.822—

    Other rheumatoid arthritis with rheumatoid factor of left elbow

  • M05.829—

    Other rheumatoid arthritis with rheumatoid factor of unspecified elbow

  • M05.831—

    Other rheumatoid arthritis with rheumatoid factor of right wrist

  • M05.832—

    Other rheumatoid arthritis with rheumatoid factor of left wrist

  • M05.839—

    Other rheumatoid arthritis with rheumatoid factor of unspecified wrist

  • M05.841—

    Other rheumatoid arthritis with rheumatoid factor of right hand

  • M05.842—

    Other rheumatoid arthritis with rheumatoid factor of left hand

  • M05.849—

    Other rheumatoid arthritis with rheumatoid factor of unspecified hand

  • M05.851—

    Other rheumatoid arthritis with rheumatoid factor of right hip

  • M05.852—

    Other rheumatoid arthritis with rheumatoid factor of left hip

  • M05.859—

    Other rheumatoid arthritis with rheumatoid factor of unspecified hip

  • M05.861—

    Other rheumatoid arthritis with rheumatoid factor of right knee

  • M05.862—

    Other rheumatoid arthritis with rheumatoid factor of left knee

  • M05.869—

    Other rheumatoid arthritis with rheumatoid factor of unspecified knee

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