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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  • M05.871—

    Other rheumatoid arthritis with rheumatoid factor of right ankle and foot

  • M05.872—

    Other rheumatoid arthritis with rheumatoid factor of left ankle and foot

  • M05.879—

    Other rheumatoid arthritis with rheumatoid factor of unspecified ankle and foot

  • M05.89—

    Other rheumatoid arthritis with rheumatoid factor of multiple sites

  • M05.8A—

    Other rheumatoid arthritis with rheumatoid factor of other specified site

  • M05.9—

    Rheumatoid arthritis with rheumatoid factor, unspecified

  • M05.A—

    Abnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis

  • M06.00—

    Rheumatoid arthritis without rheumatoid factor, unspecified site

  • M06.011—

    Rheumatoid arthritis without rheumatoid factor, right shoulder

  • M06.012—

    Rheumatoid arthritis without rheumatoid factor, left shoulder

  • M06.019—

    Rheumatoid arthritis without rheumatoid factor, unspecified shoulder

  • M06.021—

    Rheumatoid arthritis without rheumatoid factor, right elbow

  • M06.022—

    Rheumatoid arthritis without rheumatoid factor, left elbow

  • M06.029—

    Rheumatoid arthritis without rheumatoid factor, unspecified elbow

  • M06.031—

    Rheumatoid arthritis without rheumatoid factor, right wrist

  • M06.032—

    Rheumatoid arthritis without rheumatoid factor, left wrist

  • M06.039—

    Rheumatoid arthritis without rheumatoid factor, unspecified wrist

  • M06.041—

    Rheumatoid arthritis without rheumatoid factor, right hand

  • M06.042—

    Rheumatoid arthritis without rheumatoid factor, left hand

  • M06.049—

    Rheumatoid arthritis without rheumatoid factor, unspecified hand

  • M06.051—

    Rheumatoid arthritis without rheumatoid factor, right hip

  • M06.052—

    Rheumatoid arthritis without rheumatoid factor, left hip

  • M06.059—

    Rheumatoid arthritis without rheumatoid factor, unspecified hip

  • M06.061—

    Rheumatoid arthritis without rheumatoid factor, right knee

  • M06.062—

    Rheumatoid arthritis without rheumatoid factor, left knee

  • M06.069—

    Rheumatoid arthritis without rheumatoid factor, unspecified knee

  • M06.071—

    Rheumatoid arthritis without rheumatoid factor, right ankle and foot

  • M06.072—

    Rheumatoid arthritis without rheumatoid factor, left ankle and foot

  • M06.079—

    Rheumatoid arthritis without rheumatoid factor, unspecified ankle and foot

  • M06.08—

    Rheumatoid arthritis without rheumatoid factor, vertebrae

  • M06.09—

    Rheumatoid arthritis without rheumatoid factor, multiple sites

  • M06.0A—

    Rheumatoid arthritis without rheumatoid factor, other specified site

  • M06.1—

    Adult-onset Still's disease

  • M06.20—

    Rheumatoid bursitis, unspecified site

  • M06.211—

    Rheumatoid bursitis, right shoulder

  • M06.212—

    Rheumatoid bursitis, left shoulder

  • M06.219—

    Rheumatoid bursitis, unspecified shoulder

  • M06.221—

    Rheumatoid bursitis, right elbow

  • M06.222—

    Rheumatoid bursitis, left elbow

  • M06.229—

    Rheumatoid bursitis, unspecified elbow

  • M06.231—

    Rheumatoid bursitis, right wrist

  • M06.232—

    Rheumatoid bursitis, left wrist

  • M06.239—

    Rheumatoid bursitis, unspecified wrist

  • M06.241—

    Rheumatoid bursitis, right hand

  • M06.242—

    Rheumatoid bursitis, left hand

  • M06.249—

    Rheumatoid bursitis, unspecified hand

  • M06.251—

    Rheumatoid bursitis, right hip

  • M06.252—

    Rheumatoid bursitis, left hip

  • M06.259—

    Rheumatoid bursitis, unspecified hip

  • M06.261—

    Rheumatoid bursitis, right knee

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