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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  • M26.07—

    Excessive tuberosity of jaw

  • M26.09—

    Other specified anomalies of jaw size

  • M26.1—

    Anomalies of jaw-cranial base relationship

  • 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

  • M26.2—

    Anomalies of dental arch relationship

  • M26.20—

    Unspecified anomaly of dental arch relationship

  • M26.21—

    Malocclusion, Angle's class

  • 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

  • M26.22—

    Open occlusal relationship

  • 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

  • M26.3—

    Anomalies of tooth position of fully erupted tooth or teeth

  • 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)

  • M26.37—

    Excessive interocclusal distance of fully erupted teeth

  • M26.39—

    Other anomalies of tooth position of fully erupted tooth or teeth

  • M26.4—

    Malocclusion, unspecified

  • M26.5—

    Dentofacial functional abnormalities

  • M26.50—

    Dentofacial functional abnormalities, unspecified

  • M26.51—

    Abnormal jaw closure

  • M26.52—

    Limited mandibular range of motion

  • M26.53—

    Deviation in opening and closing of the mandible

  • M26.54—

    Insufficient anterior guidance

  • M26.55—

    Centric occlusion maximum intercuspation discrepancy

  • M26.56—

    Non-working side interference

  • M26.57—

    Lack of posterior occlusal support

  • M26.59—

    Other dentofacial functional abnormalities

  • M26.6—

    Temporomandibular joint disorders

  • M26.60—

    Temporomandibular joint disorder, unspecified

  • M26.601—

    Right temporomandibular joint disorder, unspecified

  • M26.602—

    Left temporomandibular joint disorder, unspecified

  • M26.603—

    Bilateral temporomandibular joint disorder, unspecified

  • M26.609—

    Unspecified temporomandibular joint disorder, unspecified side

  • M26.61—

    Adhesions and ankylosis of temporomandibular joint

  • M26.611—

    Adhesions and ankylosis of right temporomandibular joint

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