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Q18 Other congenital malformations of face and neck

ICD-10-CM category Q18 sits in Chapter 17 (Congenital malformations, deformations and chromosomal abnormalities, Q00-Q99). It contains 10 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Billable codes in Q18

CodeDescription
Q18.0Sinus, fistula and cyst of branchial cleft
Q18.1Preauricular sinus and cyst
Q18.2Other branchial cleft malformations
Q18.3Webbing of neck
Q18.4Macrostomia
Q18.5Microstomia
Q18.6Macrocheilia
Q18.7Microcheilia
Q18.8Other specified congenital malformations of face and neck
Q18.9Congenital malformation of face and neck, unspecified

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