ICD-10-CM > M00-M99 > M26-M27 > M26 > M26.0 M26.0 Major anomalies of jaw size Non-Billable/Non-Specific Type 1 Excludes acromegaly (E22.0)Robin's syndrome (Q87.0) Codes M26.00Unspecified anomaly of jaw sizeM26.01Maxillary hyperplasiaM26.02Maxillary hypoplasiaM26.03Mandibular hyperplasiaM26.04Mandibular hypoplasiaM26.05MacrogeniaM26.06MicrogeniaM26.07Excessive tuberosity of jawM26.09Other specified anomalies of jaw size