ICD-10-CM · Chapter 17 · Q00–Q99
Q04.1
Arhinencephaly
Congenital malformations, deformations and chromosomal abnormalities
Quick facts
- Code
- Q04.1
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities
- Category
- Q04 — Other congenital malformations of brain
- Specificity
- 4 characters
How coders use this code
ICD-10-CM Q04.1 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of arhinencephaly. 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 Q04
- Q04Other congenital malformations of brain
- Q04.0Congenital malformations of corpus callosum
- Q04.2Holoprosencephaly
- Q04.3Other reduction deformities of brain
- Q04.4Septo-optic dysplasia of brain
- Q04.5Megalencephaly
- Q04.6Congenital cerebral cysts
- Q04.8Other specified congenital malformations of brain
- Q04.9Congenital malformation of brain, unspecified
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