2027 ICD-10-CM Diagnosis Code Q18Other congenital malformations of face and neck

ICD-10-CM Codes›Q00-Q99›Q10-Q18›Q18

ICD-10-CM Q18
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q18 is a non-billable ICD-10-CM category code for other congenital malformations of face and neck, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q18.0, Q18.1, Q18.2, and Q18.3.

Code Identity

ICD-10-CM Code
Q18
Billable Status
No — Non-Billable Category
Code Describes
Other congenital malformations of face and neck
Short Description
Other congenital malformations of face and neck
Same as the full description in the CMS dataset.
Chapter
Q10-Q18
Congenital malformations of eye, ear, face and neck

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ10-Q18Congenital malformations of eye, ear, face and neck
CategoryQ18Other congenital malformations of face and neck
This CodeQ18Other congenital malformations of face and neck

Specific Coding for Other congenital malformations of face and neckOverview

Non-specific codes like Q18 require more characters. Use one of these billable codes instead:

  • Use Q18.0 for Sinus, fistula and cyst of branchial cleft

  • Use Q18.1 for Preauricular sinus and cyst

  • Use Q18.2 for Other branchial cleft malformations

  • Use Q18.3 for Webbing of neck

  • Use Q18.4 for Macrostomia

  • Use Q18.5 for Microstomia

  • Use Q18.6 for Macrocheilia

  • Use Q18.7 for Microcheilia

  • Use Q18.8 for Other specified congenital malformations of face and neck

  • Use Q18.9 for Congenital malformation of face and neck, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q18: its own notes plus those printed at block Q10-Q18 and Chapter 17. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • 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: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block Q10-Q18 Congenital malformations of eye, ear, face and neck applies to 62 codes
  • 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)
From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • inborn errors of metabolism (E70-E88)

Notes

General instructions on how these codes are used.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • Codes from this chapter are not for use on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Q18, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming Q18: they are not reported together with it, unless the two conditions are unrelated.

  • Q75 Other congenital malformations of skull and face bones
    congenital malformation of face NOS (Q18.-)

Patient EducationClinical

Craniofacial Abnormalities

Craniofacial is a medical term that relates to the bones of the skull and face. Craniofacial abnormalities are birth defects of the face or head. Some, like cleft lip and palate, are among the most common of all birth defects. Others are very rare. Most of them affect how a person's face or head looks.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Q18Overview

What is the ICD-10 code for other congenital malformations of face and neck?

Q18 is the ICD-10-CM category for other congenital malformations of face and neck, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is Q18 (Other congenital malformations of face and neck) a billable code?

No. This is a category header that groups the codes for other congenital malformations of face and neck, and headers cannot be submitted on claims. Claims for other congenital malformations of face and neck need a more specific code from this category, such as Q18.0, Q18.1, and Q18.2.

Can Q18 be reported with a code from Q75?

Not as a rule. The Excludes1 note on Q18 lists "congenital malformations of skull and face bones (Q75.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).