M26.53 Deviation in opening and closing of the mandible

Billable ICD-10-CM code, FY2026.

Applies from M26.5 Dentofacial functional abnormalities

Excludes1 (never code together)

• bruxism (F45.8)
• teeth-grinding NOS (F45.8)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 524.53 Deviation in opening and closing of the mandible

Code annotations containing back-references to M26.53

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 M26.53

• Deviation (in) › opening and closing of the mandible

Nearby codes

• 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 (this code)
• 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