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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  • M25.762—

    Osteophyte, left knee

  • M25.769—

    Osteophyte, unspecified knee

  • M25.77—

    Osteophyte, ankle and foot

  • M25.771—

    Osteophyte, right ankle

  • M25.772—

    Osteophyte, left ankle

  • M25.773—

    Osteophyte, unspecified ankle

  • M25.774—

    Osteophyte, right foot

  • M25.775—

    Osteophyte, left foot

  • M25.776—

    Osteophyte, unspecified foot

  • M25.78—

    Osteophyte, vertebrae

  • M25.8—

    Other specified joint disorders

  • M25.80—

    Other specified joint disorders, unspecified joint

  • M25.81—

    Other specified joint disorders, shoulder

  • M25.811—

    Other specified joint disorders, right shoulder

  • M25.812—

    Other specified joint disorders, left shoulder

  • M25.819—

    Other specified joint disorders, unspecified shoulder

  • M25.82—

    Other specified joint disorders, elbow

  • M25.821—

    Other specified joint disorders, right elbow

  • M25.822—

    Other specified joint disorders, left elbow

  • M25.829—

    Other specified joint disorders, unspecified elbow

  • M25.83—

    Other specified joint disorders, wrist

  • M25.831—

    Other specified joint disorders, right wrist

  • M25.832—

    Other specified joint disorders, left wrist

  • M25.839—

    Other specified joint disorders, unspecified wrist

  • M25.84—

    Other specified joint disorders, hand

  • M25.841—

    Other specified joint disorders, right hand

  • M25.842—

    Other specified joint disorders, left hand

  • M25.849—

    Other specified joint disorders, unspecified hand

  • M25.85—

    Other specified joint disorders, hip

  • M25.851—

    Other specified joint disorders, right hip

  • M25.852—

    Other specified joint disorders, left hip

  • M25.859—

    Other specified joint disorders, unspecified hip

  • M25.86—

    Other specified joint disorders, knee

  • M25.861—

    Other specified joint disorders, right knee

  • M25.862—

    Other specified joint disorders, left knee

  • M25.869—

    Other specified joint disorders, unspecified knee

  • M25.87—

    Other specified joint disorders, ankle and foot

  • M25.871—

    Other specified joint disorders, right ankle and foot

  • M25.872—

    Other specified joint disorders, left ankle and foot

  • M25.879—

    Other specified joint disorders, unspecified ankle and foot

  • M25.9—

    Joint disorder, unspecified

  • M26—

    Dentofacial anomalies [including malocclusion]

  • M26.0—

    Major anomalies of jaw size

  • M26.00—

    Unspecified anomaly of jaw size

  • M26.01—

    Maxillary hyperplasia

  • M26.02—

    Maxillary hypoplasia

  • M26.03—

    Mandibular hyperplasia

  • M26.04—

    Mandibular hypoplasia

  • M26.05—

    Macrogenia

  • M26.06—

    Microgenia

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