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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  • M1A.1511—

    Lead-induced chronic gout, right hip, with tophus (tophi)

  • M1A.152—

    Lead-induced chronic gout, left hip

  • M1A.1520—

    Lead-induced chronic gout, left hip, without tophus (tophi)

  • M1A.1521—

    Lead-induced chronic gout, left hip, with tophus (tophi)

  • M1A.159—

    Lead-induced chronic gout, unspecified hip

  • M1A.1590—

    Lead-induced chronic gout, unspecified hip, without tophus (tophi)

  • M1A.1591—

    Lead-induced chronic gout, unspecified hip, with tophus (tophi)

  • M1A.161—

    Lead-induced chronic gout, right knee

  • M1A.1610—

    Lead-induced chronic gout, right knee, without tophus (tophi)

  • M1A.1611—

    Lead-induced chronic gout, right knee, with tophus (tophi)

  • M1A.162—

    Lead-induced chronic gout, left knee

  • M1A.1620—

    Lead-induced chronic gout, left knee, without tophus (tophi)

  • M1A.1621—

    Lead-induced chronic gout, left knee, with tophus (tophi)

  • M1A.169—

    Lead-induced chronic gout, unspecified knee

  • M1A.1690—

    Lead-induced chronic gout, unspecified knee, without tophus (tophi)

  • M1A.1691—

    Lead-induced chronic gout, unspecified knee, with tophus (tophi)

  • M1A.171—

    Lead-induced chronic gout, right ankle and foot

  • M1A.1710—

    Lead-induced chronic gout, right ankle and foot, without tophus (tophi)

  • M1A.1711—

    Lead-induced chronic gout, right ankle and foot, with tophus (tophi)

  • M1A.172—

    Lead-induced chronic gout, left ankle and foot

  • M1A.1720—

    Lead-induced chronic gout, left ankle and foot, without tophus (tophi)

  • M1A.1721—

    Lead-induced chronic gout, left ankle and foot, with tophus (tophi)

  • M1A.179—

    Lead-induced chronic gout, unspecified ankle and foot

  • M1A.1790—

    Lead-induced chronic gout, unspecified ankle and foot, without tophus (tophi)

  • M1A.1791—

    Lead-induced chronic gout, unspecified ankle and foot, with tophus (tophi)

  • M1A.18—

    Lead-induced chronic gout, vertebrae

  • M1A.18X0—

    Lead-induced chronic gout, vertebrae, without tophus (tophi)

  • M1A.18X1—

    Lead-induced chronic gout, vertebrae, with tophus (tophi)

  • M1A.19—

    Lead-induced chronic gout, multiple sites

  • M1A.19X0—

    Lead-induced chronic gout, multiple sites, without tophus (tophi)

  • M1A.19X1—

    Lead-induced chronic gout, multiple sites, with tophus (tophi)

  • M1A.20—

    Drug-induced chronic gout, unspecified site

  • M1A.20X0—

    Drug-induced chronic gout, unspecified site, without tophus (tophi)

  • M1A.20X1—

    Drug-induced chronic gout, unspecified site, with tophus (tophi)

  • M1A.211—

    Drug-induced chronic gout, right shoulder

  • M1A.2110—

    Drug-induced chronic gout, right shoulder, without tophus (tophi)

  • M1A.2111—

    Drug-induced chronic gout, right shoulder, with tophus (tophi)

  • M1A.212—

    Drug-induced chronic gout, left shoulder

  • M1A.2120—

    Drug-induced chronic gout, left shoulder, without tophus (tophi)

  • M1A.2121—

    Drug-induced chronic gout, left shoulder, with tophus (tophi)

  • M1A.219—

    Drug-induced chronic gout, unspecified shoulder

  • M1A.2190—

    Drug-induced chronic gout, unspecified shoulder, without tophus (tophi)

  • M1A.2191—

    Drug-induced chronic gout, unspecified shoulder, with tophus (tophi)

  • M1A.221—

    Drug-induced chronic gout, right elbow

  • M1A.2210—

    Drug-induced chronic gout, right elbow, without tophus (tophi)

  • M1A.2211—

    Drug-induced chronic gout, right elbow, with tophus (tophi)

  • M1A.222—

    Drug-induced chronic gout, left elbow

  • M1A.2220—

    Drug-induced chronic gout, left elbow, without tophus (tophi)

  • M1A.2221—

    Drug-induced chronic gout, left elbow, with tophus (tophi)

  • M1A.229—

    Drug-induced chronic gout, unspecified elbow

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