DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q18 Other congenital malformations of face and neck

  • Header · not billable

Q18 is not billable. The category heads 10 billable codes in FY2027: the 10 codes directly below it.

Index → code

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q10-Q18 Congenital malformations of eye, ear, face and neck (Q10-Q18)
  3. Q18 Other congenital malformations of face and neck
Billable codes
10
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
66

Codes in Q18

  1. Q18.0
    Sinus, fistula and cyst of branchial cleft
    BillableExempt
    Inclusion terms 1

    Inclusion terms

    • Branchial vestige
  2. Q18.1
    Preauricular sinus and cyst
    BillableExempt
    Inclusion terms 2

    Inclusion terms

    • Fistula of auricle, congenital
    • Cervicoaural fistula
  3. Q18.2
    Other branchial cleft malformations
    BillableExempt
    Inclusion terms 3

    Inclusion terms

    • Branchial cleft malformation NOS
    • Cervical auricle
    • Otocephaly
  4. Q18.3
    Webbing of neck
    BillableExempt
    Inclusion terms 1

    Inclusion terms

    • Pterygium colli
  5. Q18.4
    Macrostomia
    BillableExempt
  6. Q18.5
    Microstomia
    BillableExempt
  7. Q18.6
    Macrocheilia
    BillableExempt
    Inclusion terms 1

    Inclusion terms

    • Hypertrophy of lip, congenital
  8. Q18.7
    Microcheilia
    BillableExempt
  9. Q18.8
    Other specified congenital malformations of face and neck
    BillableExempt
    Inclusion terms 3

    Inclusion terms

    • Medial cyst of face and neck
    • Medial fistula of face and neck
    • Medial sinus of face and neck
  10. Q18.9
    Congenital malformation of face and neck, unspecified
    BillableExempt
    Inclusion terms 1

    Inclusion terms

    • Congenital anomaly NOS of face and neck

Sources of each column.

Instructions

At Q18

Excludes1

  • cleft lip and cleft palate (Q35-Q37) Q35 Q37
  • conditions classified to Q67.0-Q67.4 Q67.0 Q67.4
  • congenital malformations of skull and face bones (Q75.-) Q75
  • cyclopia (Q87.0) Q87.0
  • dentofacial anomalies [including malocclusion] (M26.-) M26
  • malformation syndromes affecting facial appearance (Q87.0) Q87.0
  • persistent thyroglossal duct (Q89.2) Q89.2

Notes that also apply

Block Q10-Q18 instructions (Excludes2 7): printed on the block page.

Chapter 17 instructions (Notes 1, Excludes2 1): printed on the chapter 17 page.

Index entries

  • Branchiogenic remnant (in neck) → Q18.0
  • Otocephaly → Q18.2
  • Macrostomia (congenital) → Q18.4
  • Meloschisis → Q18.4
  • Microstomia (congenital) → Q18.5
  • Macrocheilia, macrochilia (congenital) → Q18.6
  • Microcheilia → Q18.7
  • Cyst (colloid) (mucous) (simple) (retention)branchial (cleft) → Q18.0
  • Cyst (colloid) (mucous) (simple) (retention)branchiogenic → Q18.0
  • Cyst (colloid) (mucous) (simple) (retention)cervical lateral → Q18.0
  • Fistula (cutaneous)branchial (cleft) → Q18.0
  • Fistula (cutaneous)branchiogenous → Q18.0
  • Infection, infected, infective (opportunistic)branchial cyst → Q18.0
  • Sinusbranchial cleft (internal) (external) → Q18.0
  • Vestige, vestigialbranchial → Q18.0
  • Cyst (colloid) (mucous) (simple) (retention)ear (external) → Q18.1
  • Cyst (colloid) (mucous) (simple) (retention)preauricular → Q18.1
  • Fistula (cutaneous)cervical, lateral → Q18.1
  • Fistula (cutaneous)cervicoaural → Q18.1
  • Fistula (cutaneous)preauricular (congenital) → Q18.1
  • Sinuspreauricular → Q18.1
  • Auricle, auricularcervical → Q18.2
  • Branchialcartilage, congenital → Q18.2
  • Cervicalauricle → Q18.2
  • Cleft (congenital)branchial (persistent) → Q18.2
  • Malformation (congenital)branchial cleft → Q18.2
  • Persistence, persistent (congenital)branchial cleft NOS → Q18.2
  • Pterygium (eye)colli → Q18.3
  • Web, webbed (congenital)neck (pterygium colli) → Q18.3
  • Absence (of) (organ or part) (complete or partial)chin, congenital → Q18.8
  • Absence (of) (organ or part) (complete or partial)face, specified part NEC → Q18.8
  • Absence (of) (organ or part) (complete or partial)neck, part → Q18.8
  • Agenesischin → Q18.8
  • Agenesisneck, part → Q18.8
  • Anomaly, anomalous (congenital) (unspecified type)eyebrow → Q18.8
  • Cyst (colloid) (mucous) (simple) (retention)medial, face and neck → Q18.8
  • Deformityeyebrow (congenital) → Q18.8
  • Fistula (cutaneous)medial, face and neck → Q18.8
  • Flatteninglip (congenital) → Q18.8
  • Hypoplasia, hypoplasticface → Q18.8

26 more, longer entries are not listed; the search box finds them by word.

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