Q18.4

Billable

Macrostomia

Q18.4 is the ICD-10-CM code for Macrostomia. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
Q00-Q99
Parent
Q18
Edition
FY2026

Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code Q18.4?
Q18.4 is the ICD-10-CM code for "Macrostomia". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q18.4 a billable code?
Yes — Q18.4 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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