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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  • M06.262—

    Rheumatoid bursitis, left knee

  • M06.269—

    Rheumatoid bursitis, unspecified knee

  • M06.271—

    Rheumatoid bursitis, right ankle and foot

  • M06.272—

    Rheumatoid bursitis, left ankle and foot

  • M06.279—

    Rheumatoid bursitis, unspecified ankle and foot

  • M06.28—

    Rheumatoid bursitis, vertebrae

  • M06.29—

    Rheumatoid bursitis, multiple sites

  • M06.30—

    Rheumatoid nodule, unspecified site

  • M06.311—

    Rheumatoid nodule, right shoulder

  • M06.312—

    Rheumatoid nodule, left shoulder

  • M06.319—

    Rheumatoid nodule, unspecified shoulder

  • M06.321—

    Rheumatoid nodule, right elbow

  • M06.322—

    Rheumatoid nodule, left elbow

  • M06.329—

    Rheumatoid nodule, unspecified elbow

  • M06.331—

    Rheumatoid nodule, right wrist

  • M06.332—

    Rheumatoid nodule, left wrist

  • M06.339—

    Rheumatoid nodule, unspecified wrist

  • M06.341—

    Rheumatoid nodule, right hand

  • M06.342—

    Rheumatoid nodule, left hand

  • M06.349—

    Rheumatoid nodule, unspecified hand

  • M06.351—

    Rheumatoid nodule, right hip

  • M06.352—

    Rheumatoid nodule, left hip

  • M06.359—

    Rheumatoid nodule, unspecified hip

  • M06.361—

    Rheumatoid nodule, right knee

  • M06.362—

    Rheumatoid nodule, left knee

  • M06.369—

    Rheumatoid nodule, unspecified knee

  • M06.371—

    Rheumatoid nodule, right ankle and foot

  • M06.372—

    Rheumatoid nodule, left ankle and foot

  • M06.379—

    Rheumatoid nodule, unspecified ankle and foot

  • M06.38—

    Rheumatoid nodule, vertebrae

  • M06.39—

    Rheumatoid nodule, multiple sites

  • M06.4—

    Inflammatory polyarthropathy

  • M06.80—

    Other specified rheumatoid arthritis, unspecified site

  • M06.811—

    Other specified rheumatoid arthritis, right shoulder

  • M06.812—

    Other specified rheumatoid arthritis, left shoulder

  • M06.819—

    Other specified rheumatoid arthritis, unspecified shoulder

  • M06.821—

    Other specified rheumatoid arthritis, right elbow

  • M06.822—

    Other specified rheumatoid arthritis, left elbow

  • M06.829—

    Other specified rheumatoid arthritis, unspecified elbow

  • M06.831—

    Other specified rheumatoid arthritis, right wrist

  • M06.832—

    Other specified rheumatoid arthritis, left wrist

  • M06.839—

    Other specified rheumatoid arthritis, unspecified wrist

  • M06.841—

    Other specified rheumatoid arthritis, right hand

  • M06.842—

    Other specified rheumatoid arthritis, left hand

  • M06.849—

    Other specified rheumatoid arthritis, unspecified hand

  • M06.851—

    Other specified rheumatoid arthritis, right hip

  • M06.852—

    Other specified rheumatoid arthritis, left hip

  • M06.859—

    Other specified rheumatoid arthritis, unspecified hip

  • M06.861—

    Other specified rheumatoid arthritis, right knee

  • M06.862—

    Other specified rheumatoid arthritis, left knee

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