M26 Dentofacial anomalies [including malocclusion]
ICD-10-CM category M26 sits in Chapter 13 (Diseases of the musculoskeletal system and connective tissue, M00-M99). It contains 78 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
M26.0 Major anomalies of jaw sizeM26.1 Anomalies of jaw-cranial base relationshipM26.2 Anomalies of dental arch relationshipM26.21 Malocclusion, Angle's classM26.22 Open occlusal relationshipM26.3 Anomalies of tooth position of fully erupted tooth or teethM26.5 Dentofacial functional abnormalitiesM26.6 Temporomandibular joint disordersM26.60 Temporomandibular joint disorder, unspecifiedM26.61 Adhesions and ankylosis of temporomandibular jointM26.62 Arthralgia of temporomandibular jointM26.63 Articular disc disorder of temporomandibular jointM26.64 Arthritis of temporomandibular jointM26.65 Arthropathy of temporomandibular jointM26.7 Dental alveolar anomaliesM26.8 Other dentofacial anomalies
Billable codes in M26
| Code | Description |
|---|---|
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) |
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 |
M26.50 | 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 |
M26.601 | 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 |
M26.611 | Adhesions and ankylosis of right temporomandibular joint |
M26.612 | Adhesions and ankylosis of left temporomandibular joint |
M26.613 | Adhesions and ankylosis of bilateral temporomandibular joint |
M26.619 | Adhesions and ankylosis of temporomandibular joint, unspecified side |
M26.621 | Arthralgia of right temporomandibular joint |
M26.622 | Arthralgia of left temporomandibular joint |
M26.623 | Arthralgia of bilateral temporomandibular joint |
M26.629 | Arthralgia of temporomandibular joint, unspecified side |
M26.631 | Articular disc disorder of right temporomandibular joint |
M26.632 | Articular disc disorder of left temporomandibular joint |
M26.633 | Articular disc disorder of bilateral temporomandibular joint |
M26.639 | Articular disc disorder of temporomandibular joint, unspecified side |
M26.641 | Arthritis of right temporomandibular joint |
M26.642 | Arthritis of left temporomandibular joint |
M26.643 | Arthritis of bilateral temporomandibular joint |
M26.649 | Arthritis of unspecified temporomandibular joint |
M26.651 | Arthropathy of right temporomandibular joint |
M26.652 | Arthropathy of left temporomandibular joint |
M26.653 | Arthropathy of bilateral temporomandibular joint |
M26.659 | Arthropathy of unspecified temporomandibular joint |
M26.69 | Other specified disorders of temporomandibular joint |
M26.70 | Unspecified alveolar anomaly |
M26.71 | Alveolar maxillary hyperplasia |
M26.72 | Alveolar mandibular hyperplasia |
M26.73 | Alveolar maxillary hypoplasia |
M26.74 | Alveolar mandibular hypoplasia |
M26.79 | Other specified alveolar anomalies |
M26.81 | Anterior soft tissue impingement |
M26.82 | Posterior soft tissue impingement |
M26.89 | Other dentofacial anomalies |
M26.9 | Dentofacial anomaly, unspecified |
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