M26.221 Open posterior occlusal relationship

Billable ICD-10-CM code, FY2026.

Applicable to

• Posterior open bite

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 524.25 Open posterior occlusal relationship

Code annotations containing back-references to M26.221

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 M26.221

• Open, opening › bite › posterior
• Relationship › occlusal › open posterior

Nearby codes

• 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 (this code)
• 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