Anomalies of tooth position of fully erupted tooth or teeth

M26.30 identifies an anomaly of tooth position affecting a fully erupted tooth or teeth when the specific type of positional abnormality is not documented or cannot be further specified.

Dental crowding in which fully erupted permanent teeth lack adequate arch space, causing overlapping, displacement, or malalignment of teeth that have already completely emerged through the gingiva.

Abnormal excess space between fully erupted permanent teeth, including diastema (gap between teeth) not otherwise specified.

M26.33 identifies horizontal displacement of a fully erupted tooth or teeth — including tipped teeth and tipping of fully erupted teeth — within the dentofacial anomalies classification.

M26.34 identifies vertical displacement of a fully erupted tooth or teeth — encompassing extrusion (supraeruption) away from the alveolar bone and infraeruption toward it — classified as a dentofacial anomaly of tooth position.

M26.35 identifies an anomaly of tooth position in which a fully erupted tooth or multiple fully erupted teeth are axially rotated out of their normal alignment within the dental arch.

M26.36 identifies an insufficient interocclusal distance among fully erupted teeth — meaning the vertical space between upper and lower dental arches when the jaw is at rest or in occlusion is inadequate. The ICD-10-CM Tabular also recognizes this as lack of adequate intermaxillary vertical dimension of fully erupted teeth (ridge).

M26.37 identifies an abnormally increased vertical space between opposing fully erupted teeth when the jaw is at rest — encompassing both excessive intermaxillary vertical dimension and loss of occlusal vertical dimension.

M26.39 captures positional anomalies of fully erupted teeth that don't map to a more specific code in the M26.3 subcategory — including tipping, protrusion, retroclination, buccoversion, linguoversion, and related positional variants.