ICD-10-CM · Chapter 17 · Q00–Q99
Q18.4
Macrostomia
Congenital malformations, deformations and chromosomal abnormalities
Quick facts
- Code
- Q18.4
- 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 Q18.4 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of macrostomia. 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
- Q18.1Preauricular sinus and cyst
- Q18.2Other branchial cleft malformations
- Q18.3Webbing of neck
- 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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