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Q18 ICD-10-CM Code: Other congenital malformations of face and neck

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Official description

Q18

Other congenital malformations of face and neck

ICD-10-CM diagnosis code · United States clinical modification

Where Q18 sits

  1. 1

    Chapter 17

    Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)

  2. 2

    Section

    Congenital malformations of eye, ear, face and neck (Q10-Q18)

  3. 3

    Category Q18

    Other congenital malformations of face and neck

  4. 4

    Code Q18

    Other congenital malformations of face and neck

Codes under Q18

Q18 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Q18.0Sinus, fistula and cyst of branchial cleftQ18.1Preauricular sinus and cystQ18.2Other branchial cleft malformationsQ18.3Webbing of neckQ18.4MacrostomiaQ18.5MicrostomiaQ18.6MacrocheiliaQ18.7MicrocheiliaQ18.8Other specified congenital malformations of face and neckQ18.9Congenital malformation of face and neck, unspecified

Notes for this code

Inclusion terms

No inclusion terms are listed for Q18.

Code first

No “code first” instruction is listed for Q18.

Use additional code

No “use additional code” instruction is listed for Q18.

Excludes1

Conditions that should not be reported together with this code.

  • 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

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for Q18.

Source and release

Data release
U.S. ICD-10-CM · FY 2027
Effective date
Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Frequently asked questions

What does ICD-10-CM code Q18 mean?

Q18 is the FY 2027 U.S. ICD-10-CM code for “Other congenital malformations of face and neck.”

Is Q18 a billable or specific ICD-10-CM code?

No. Q18 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is Q18 located in ICD-10-CM?

Q18 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Congenital malformations of eye, ear, face and neck (Q10-Q18) (Q10–Q18), under category Q18, Other congenital malformations of face and neck.

What coding notes are listed for Q18?

No inclusion terms are listed for Q18 in this reference record. No code-first instruction is listed. Excludes1 notes: 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). No Excludes2 note is listed.