ICD-10-CM · Chapter 17 · Q00–Q99
Q18.1
Preauricular sinus and cyst
Congenital malformations, deformations and chromosomal abnormalities
Quick facts
- Code
- Q18.1
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities
- Category
- Q18 — Other congenital malformations of face and neck
- Specificity
- 4 characters
How coders use this code
ICD-10-CM Q18.1 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of preauricular sinus and cyst. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in Q18
- Q18Other congenital malformations of face and neck
- Q18.0Sinus, fistula and cyst of branchial cleft
- Q18.2Other branchial cleft malformations
- Q18.3Webbing of neck
- Q18.4Macrostomia
- Q18.5Microstomia
- Q18.6Macrocheilia
- Q18.7Microcheilia
- Q18.8Other specified congenital malformations of face and neck
- Q18.9Congenital malformation of face and neck, unspecified
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