Q18 — Other congenital malformations of face and neck

Not billable

Is Q18 billable?

No — Q18 is a non-billable header code. Q18 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 10 billable codes beneath Q18.

Billable codes under this header

Q18 at a glance

Code	Q18
Description	Other congenital malformations of face and neck
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes1 — never code together

The conditions below can never be reported together with Q18 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

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)

Excludes2 — not included here — inherited from Chapter 17

The conditions below are not part of Q18, but a patient may have both at the same time. When documentation supports it, Q18 and the excluded code may both be reported.

inborn errors of metabolism (E70-E88)

Excludes2 — not included here — inherited from Q10-Q18

The conditions below are not part of Q18, but a patient may have both at the same time. When documentation supports it, Q18 and the excluded code may both be reported.

cleft lip and cleft palate (Q35-Q37)
congenital malformation of cervical spine (Q05.0, Q05.5, Q67.5, Q76.0-Q76.4)
congenital malformation of larynx (Q31.-)
congenital malformation of lip NEC (Q38.0)
congenital malformation of nose (Q30.-)
congenital malformation of parathyroid gland (Q89.2)
congenital malformation of thyroid gland (Q89.2)

What codes fall under Q18? (10)

How long has Q18 existed?

Q18 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with Q18?

ICD-10-CM declares these codes mutually exclusive with Q18 — exactly one of each pair can be correct for a given encounter.