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.411—

    Other secondary chronic gout, right shoulder

  • M1A.4110—

    Other secondary chronic gout, right shoulder, without tophus (tophi)

  • M1A.4111—

    Other secondary chronic gout, right shoulder, with tophus (tophi)

  • M1A.412—

    Other secondary chronic gout, left shoulder

  • M1A.4120—

    Other secondary chronic gout, left shoulder, without tophus (tophi)

  • M1A.4121—

    Other secondary chronic gout, left shoulder, with tophus (tophi)

  • M1A.419—

    Other secondary chronic gout, unspecified shoulder

  • M1A.4190—

    Other secondary chronic gout, unspecified shoulder, without tophus (tophi)

  • M1A.4191—

    Other secondary chronic gout, unspecified shoulder, with tophus (tophi)

  • M1A.42—

    Other secondary chronic gout, elbow

  • M1A.421—

    Other secondary chronic gout, right elbow

  • M1A.4210—

    Other secondary chronic gout, right elbow, without tophus (tophi)

  • M1A.4211—

    Other secondary chronic gout, right elbow, with tophus (tophi)

  • M1A.422—

    Other secondary chronic gout, left elbow

  • M1A.4220—

    Other secondary chronic gout, left elbow, without tophus (tophi)

  • M1A.4221—

    Other secondary chronic gout, left elbow, with tophus (tophi)

  • M1A.429—

    Other secondary chronic gout, unspecified elbow

  • M1A.4290—

    Other secondary chronic gout, unspecified elbow, without tophus (tophi)

  • M1A.4291—

    Other secondary chronic gout, unspecified elbow, with tophus (tophi)

  • M1A.43—

    Other secondary chronic gout, wrist

  • M1A.431—

    Other secondary chronic gout, right wrist

  • M1A.4310—

    Other secondary chronic gout, right wrist, without tophus (tophi)

  • M1A.4311—

    Other secondary chronic gout, right wrist, with tophus (tophi)

  • M1A.432—

    Other secondary chronic gout, left wrist

  • M1A.4320—

    Other secondary chronic gout, left wrist, without tophus (tophi)

  • M1A.4321—

    Other secondary chronic gout, left wrist, with tophus (tophi)

  • M1A.439—

    Other secondary chronic gout, unspecified wrist

  • M1A.4390—

    Other secondary chronic gout, unspecified wrist, without tophus (tophi)

  • M1A.4391—

    Other secondary chronic gout, unspecified wrist, with tophus (tophi)

  • M1A.44—

    Other secondary chronic gout, hand

  • M1A.441—

    Other secondary chronic gout, right hand

  • M1A.4410—

    Other secondary chronic gout, right hand, without tophus (tophi)

  • M1A.4411—

    Other secondary chronic gout, right hand, with tophus (tophi)

  • M1A.442—

    Other secondary chronic gout, left hand

  • M1A.4420—

    Other secondary chronic gout, left hand, without tophus (tophi)

  • M1A.4421—

    Other secondary chronic gout, left hand, with tophus (tophi)

  • M1A.449—

    Other secondary chronic gout, unspecified hand

  • M1A.4490—

    Other secondary chronic gout, unspecified hand, without tophus (tophi)

  • M1A.4491—

    Other secondary chronic gout, unspecified hand, with tophus (tophi)

  • M1A.45—

    Other secondary chronic gout, hip

  • M1A.451—

    Other secondary chronic gout, right hip

  • M1A.4510—

    Other secondary chronic gout, right hip, without tophus (tophi)

  • M1A.4511—

    Other secondary chronic gout, right hip, with tophus (tophi)

  • M1A.452—

    Other secondary chronic gout, left hip

  • M1A.4520—

    Other secondary chronic gout, left hip, without tophus (tophi)

  • M1A.4521—

    Other secondary chronic gout, left hip, with tophus (tophi)

  • M1A.459—

    Other secondary chronic gout, unspecified hip

  • M1A.4590—

    Other secondary chronic gout, unspecified hip, without tophus (tophi)

  • M1A.4591—

    Other secondary chronic gout, unspecified hip, with tophus (tophi)

  • M1A.46—

    Other secondary chronic gout, knee

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