Other congenital malformations of face and neck (Q18)

Browse all the diagnosis codes used for other congenital malformations of face and neck (q18). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.

Clinical Information

Hypertelorism - Abnormal increase in the interorbital distance due to overdevelopment of the lesser wings of the sphenoid.

Loose Anagen Hair Syndrome - Benign childhood alopecia that improves spontaneously with aging. It is characterized by anagen hairs (misshapen hair bulbs and absent inner and outer root sheaths), thin, and sparse hairs that pulls out easily.

Macrostomia - Greatly exaggerated width of the mouth, resulting from failure of union of the maxillary and mandibular processes, with extension of the oral orifice toward the ear. The defect may be unilateral or bilateral. (Dorland, 27th ed)

Microstomia - A congenital defect in which the mouth is unusually small. (Dorland, 27th ed)

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • cleft lip and cleft palate Q35 Q37
  • conditions classified to Q67.0 Q67.4
  • congenital malformations of skull and face bones Q75
  • cyclopia Q87.0
  • dentofacial anomalies [including malocclusion] M26
  • malformation syndromes affecting facial appearance Q87.0
  • persistent thyroglossal duct Q89.2