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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  • M25.16—

    Fistula, knee

  • M25.161—

    Fistula, right knee

  • M25.162—

    Fistula, left knee

  • M25.169—

    Fistula, unspecified knee

  • M25.17—

    Fistula, ankle and foot

  • M25.171—

    Fistula, right ankle

  • M25.172—

    Fistula, left ankle

  • M25.173—

    Fistula, unspecified ankle

  • M25.174—

    Fistula, right foot

  • M25.175—

    Fistula, left foot

  • M25.176—

    Fistula, unspecified foot

  • M25.18—

    Fistula, other specified site

  • M25.2—

    Flail joint

  • M25.20—

    Flail joint, unspecified joint

  • M25.21—

    Flail joint, shoulder

  • M25.211—

    Flail joint, right shoulder

  • M25.212—

    Flail joint, left shoulder

  • M25.219—

    Flail joint, unspecified shoulder

  • M25.22—

    Flail joint, elbow

  • M25.221—

    Flail joint, right elbow

  • M25.222—

    Flail joint, left elbow

  • M25.229—

    Flail joint, unspecified elbow

  • M25.23—

    Flail joint, wrist

  • M25.231—

    Flail joint, right wrist

  • M25.232—

    Flail joint, left wrist

  • M25.239—

    Flail joint, unspecified wrist

  • M25.24—

    Flail joint, hand

  • M25.241—

    Flail joint, right hand

  • M25.242—

    Flail joint, left hand

  • M25.249—

    Flail joint, unspecified hand

  • M25.25—

    Flail joint, hip

  • M25.251—

    Flail joint, right hip

  • M25.252—

    Flail joint, left hip

  • M25.259—

    Flail joint, unspecified hip

  • M25.26—

    Flail joint, knee

  • M25.261—

    Flail joint, right knee

  • M25.262—

    Flail joint, left knee

  • M25.269—

    Flail joint, unspecified knee

  • M25.27—

    Flail joint, ankle and foot

  • M25.271—

    Flail joint, right ankle and foot

  • M25.272—

    Flail joint, left ankle and foot

  • M25.279—

    Flail joint, unspecified ankle and foot

  • M25.28—

    Flail joint, other site

  • M25.3—

    Other instability of joint

  • M25.30—

    Other instability, unspecified joint

  • M25.31—

    Other instability, shoulder

  • M25.311—

    Other instability, right shoulder

  • M25.312—

    Other instability, left shoulder

  • M25.319—

    Other instability, unspecified shoulder

  • M25.32—

    Other instability, elbow

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