2026 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 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

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
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

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • 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

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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q18Overview

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.