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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  • M12.522—

    Traumatic arthropathy, left elbow

  • M12.529—

    Traumatic arthropathy, unspecified elbow

  • M12.531—

    Traumatic arthropathy, right wrist

  • M12.532—

    Traumatic arthropathy, left wrist

  • M12.539—

    Traumatic arthropathy, unspecified wrist

  • M12.541—

    Traumatic arthropathy, right hand

  • M12.542—

    Traumatic arthropathy, left hand

  • M12.549—

    Traumatic arthropathy, unspecified hand

  • M12.551—

    Traumatic arthropathy, right hip

  • M12.552—

    Traumatic arthropathy, left hip

  • M12.559—

    Traumatic arthropathy, unspecified hip

  • M12.561—

    Traumatic arthropathy, right knee

  • M12.562—

    Traumatic arthropathy, left knee

  • M12.569—

    Traumatic arthropathy, unspecified knee

  • M12.571—

    Traumatic arthropathy, right ankle and foot

  • M12.572—

    Traumatic arthropathy, left ankle and foot

  • M12.579—

    Traumatic arthropathy, unspecified ankle and foot

  • M12.58—

    Traumatic arthropathy, other specified site

  • M12.59—

    Traumatic arthropathy, multiple sites

  • M12.80—

    Other specific arthropathies, not elsewhere classified, unspecified site

  • M12.811—

    Other specific arthropathies, not elsewhere classified, right shoulder

  • M12.812—

    Other specific arthropathies, not elsewhere classified, left shoulder

  • M12.819—

    Other specific arthropathies, not elsewhere classified, unspecified shoulder

  • M12.821—

    Other specific arthropathies, not elsewhere classified, right elbow

  • M12.822—

    Other specific arthropathies, not elsewhere classified, left elbow

  • M12.829—

    Other specific arthropathies, not elsewhere classified, unspecified elbow

  • M12.831—

    Other specific arthropathies, not elsewhere classified, right wrist

  • M12.832—

    Other specific arthropathies, not elsewhere classified, left wrist

  • M12.839—

    Other specific arthropathies, not elsewhere classified, unspecified wrist

  • M12.841—

    Other specific arthropathies, not elsewhere classified, right hand

  • M12.842—

    Other specific arthropathies, not elsewhere classified, left hand

  • M12.849—

    Other specific arthropathies, not elsewhere classified, unspecified hand

  • M12.851—

    Other specific arthropathies, not elsewhere classified, right hip

  • M12.852—

    Other specific arthropathies, not elsewhere classified, left hip

  • M12.859—

    Other specific arthropathies, not elsewhere classified, unspecified hip

  • M12.861—

    Other specific arthropathies, not elsewhere classified, right knee

  • M12.862—

    Other specific arthropathies, not elsewhere classified, left knee

  • M12.869—

    Other specific arthropathies, not elsewhere classified, unspecified knee

  • M12.871—

    Other specific arthropathies, not elsewhere classified, right ankle and foot

  • M12.872—

    Other specific arthropathies, not elsewhere classified, left ankle and foot

  • M12.879—

    Other specific arthropathies, not elsewhere classified, unspecified ankle and foot

  • M12.88—

    Other specific arthropathies, not elsewhere classified, other specified site

  • M12.89—

    Other specific arthropathies, not elsewhere classified, multiple sites

  • M12.9—

    Arthropathy, unspecified

  • M13.0—

    Polyarthritis, unspecified

  • M13.10—

    Monoarthritis, not elsewhere classified, unspecified site

  • M13.111—

    Monoarthritis, not elsewhere classified, right shoulder

  • M13.112—

    Monoarthritis, not elsewhere classified, left shoulder

  • M13.119—

    Monoarthritis, not elsewhere classified, unspecified shoulder

  • M13.121—

    Monoarthritis, not elsewhere classified, right elbow

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