Alphabetic Index FY2027

Q18

Other congenital malformations of face and neck

FY2027Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders/Q10–Q18 Congenital malformations of eye, ear, face and neck

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

Q18 is a non-billable ICD-10-CM code category for other congenital malformations of face and neck. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Q18.0 Sinus, fistula and cyst of branchial cleft; Q18.1 Preauricular sinus and cyst; Q18.2 Other branchial cleft malformations; Q18.3 Webbing of neck and 6 more. Its coding notes include 7 Excludes1 entries and 8 Excludes2 entries.

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.

Guidelines I.C.17Congenital malformations and genetic disordersRead the official text

Excludes1

Not coded here. The listed conditions generally should not be reported together.

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

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (8 notes)
Inherited from Q10–Q18 Congenital malformations of eye, ear, face and neck
  • 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)
Inherited from Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
  • inborn errors of metabolism (E70-E88)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
  • Codes from this chapter are not for use on maternal records

More specific codes under Q18 10