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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  • M25.821—

    Other specified joint disorders, right elbow

  • M25.822—

    Other specified joint disorders, left elbow

  • M25.829—

    Other specified joint disorders, unspecified elbow

  • M25.831—

    Other specified joint disorders, right wrist

  • M25.832—

    Other specified joint disorders, left wrist

  • M25.839—

    Other specified joint disorders, unspecified wrist

  • M25.841—

    Other specified joint disorders, right hand

  • M25.842—

    Other specified joint disorders, left hand

  • M25.849—

    Other specified joint disorders, unspecified hand

  • M25.851—

    Other specified joint disorders, right hip

  • M25.852—

    Other specified joint disorders, left hip

  • M25.859—

    Other specified joint disorders, unspecified hip

  • M25.861—

    Other specified joint disorders, right knee

  • M25.862—

    Other specified joint disorders, left knee

  • M25.869—

    Other specified joint disorders, unspecified knee

  • 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

  • M26.00—

    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

  • M26.07—

    Excessive tuberosity of jaw

  • M26.09—

    Other specified anomalies of jaw size

  • M26.10—

    Unspecified anomaly of jaw-cranial base relationship

  • M26.11—

    Maxillary asymmetry

  • M26.12—

    Other jaw asymmetry

  • M26.19—

    Other specified anomalies of jaw-cranial base relationship

  • M26.20—

    Unspecified anomaly of dental arch relationship

  • M26.211—

    Malocclusion, Angle's class I

  • M26.212—

    Malocclusion, Angle's class II

  • M26.213—

    Malocclusion, Angle's class III

  • M26.219—

    Malocclusion, Angle's class, unspecified

  • M26.220—

    Open anterior occlusal relationship

  • M26.221—

    Open posterior occlusal relationship

  • M26.23—

    Excessive horizontal overlap

  • M26.24—

    Reverse articulation

  • M26.25—

    Anomalies of interarch distance

  • M26.29—

    Other anomalies of dental arch relationship

  • M26.30—

    Unspecified anomaly of tooth position of fully erupted tooth or teeth

  • M26.31—

    Crowding of fully erupted teeth

  • M26.32—

    Excessive spacing of fully erupted teeth

  • M26.33—

    Horizontal displacement of fully erupted tooth or teeth

  • M26.34—

    Vertical displacement of fully erupted tooth or teeth

  • M26.35—

    Rotation of fully erupted tooth or teeth

  • M26.36—

    Insufficient interocclusal distance of fully erupted teeth (ridge)

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