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.08X0—

    Idiopathic chronic gout, vertebrae, without tophus (tophi)

  • M1A.08X1—

    Idiopathic chronic gout, vertebrae, with tophus (tophi)

  • M1A.09—

    Idiopathic chronic gout, multiple sites

  • M1A.09X0—

    Idiopathic chronic gout, multiple sites, without tophus (tophi)

  • M1A.09X1—

    Idiopathic chronic gout, multiple sites, with tophus (tophi)

  • M1A.1—

    Lead-induced chronic gout

  • M1A.10—

    Lead-induced chronic gout, unspecified site

  • M1A.10X0—

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

  • M1A.10X1—

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

  • M1A.11—

    Lead-induced chronic gout, shoulder

  • M1A.111—

    Lead-induced chronic gout, right shoulder

  • M1A.1110—

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

  • M1A.1111—

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

  • M1A.112—

    Lead-induced chronic gout, left shoulder

  • M1A.1120—

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

  • M1A.1121—

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

  • M1A.119—

    Lead-induced chronic gout, unspecified shoulder

  • M1A.1190—

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

  • M1A.1191—

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

  • M1A.12—

    Lead-induced chronic gout, elbow

  • M1A.121—

    Lead-induced chronic gout, right elbow

  • M1A.1210—

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

  • M1A.1211—

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

  • M1A.122—

    Lead-induced chronic gout, left elbow

  • M1A.1220—

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

  • M1A.1221—

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

  • M1A.129—

    Lead-induced chronic gout, unspecified elbow

  • M1A.1290—

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

  • M1A.1291—

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

  • M1A.13—

    Lead-induced chronic gout, wrist

  • M1A.131—

    Lead-induced chronic gout, right wrist

  • M1A.1310—

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

  • M1A.1311—

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

  • M1A.132—

    Lead-induced chronic gout, left wrist

  • M1A.1320—

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

  • M1A.1321—

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

  • M1A.139—

    Lead-induced chronic gout, unspecified wrist

  • M1A.1390—

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

  • M1A.1391—

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

  • M1A.14—

    Lead-induced chronic gout, hand

  • M1A.141—

    Lead-induced chronic gout, right hand

  • M1A.1410—

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

  • M1A.1411—

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

  • M1A.142—

    Lead-induced chronic gout, left hand

  • M1A.1420—

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

  • M1A.1421—

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

  • M1A.149—

    Lead-induced chronic gout, unspecified hand

  • M1A.1490—

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

  • M1A.1491—

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

  • M1A.15—

    Lead-induced chronic gout, hip

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