Q18: Other congenital malformations of face and neck

Codes under Q18 (Other congenital malformations of face and neck). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

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

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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