M26.20 Unspecified anomaly of dental arch relationship

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 524.20 Unspecified anomaly of dental arch relationship

Code annotations containing back-references to M26.20

Back-references to M26

• Type 2 Excludes: K08 Other disorders of teeth and supporting structures ("dentofacial anomalies [including malocclusion] (M26.-)")
• Type 2 Excludes: M95 Other acquired deformities of musculoskeletal system and connective tissue ("dentofacial anomalies [including malocclusion] (M26.-)")
• Type 1 Excludes: Q18 Other congenital malformations of face and neck ("dentofacial anomalies [including malocclusion] (M26.-)")
• Type 1 Excludes: Q38 Other congenital malformations of tongue, mouth and pharynx ("dentofacial anomalies (M26.-)")
• Type 1 Excludes: Q67.4 Other congenital deformities of skull, face and jaw ("dentofacial anomalies [including malocclusion] (M26.-)")
• Type 1 Excludes: Q75 Other congenital malformations of skull and face bones ("dentofacial anomalies [including malocclusion] (M26.-)")

Diagnosis Index entries for M26.20

• Anomaly, anomalous (congenital) (unspecified type) › dental › arch relationship
• Anomaly, anomalous (congenital) (unspecified type) › dentofacial › dental arch relationship

Nearby codes

• 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 (this code)
• 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