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Compare/Q18 vs Q31

Q18 vs Q31

Q18 (Other congenital malformations of face and neck) compared with Q31 (Congenital malformations of larynx), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. Q18 carries an Excludes2 note covering Q31: “congenital malformation of larynx (Q31.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

Q18Other congenital malformations of face and neckQ31Congenital malformations of larynx
Billing statusNon-billable header

Report instead: Q18.0, Q18.1, Q18.2, Q18.3, Q18.4

Non-billable header

Report instead: Q31.0, Q31.1, Q31.2, Q31.3, Q31.5

ClassificationQ00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99)Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99)
DefinitionOther congenital malformations of face and neck is a non-billable ICD-10-CM category code (Q18).Congenital malformations of larynx is a non-billable ICD-10-CM category code (Q31).
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources