ICD-10-CM · FY 2026 APRIL UPDATE
Q04
Other congenital malformations of brain
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| Q04.0 | Congenital malformations of corpus callosum | Billable |
| Q04.1 | Arhinencephaly | Billable |
| Q04.2 | Holoprosencephaly | Billable |
| Q04.3 | Other reduction deformities of brain | Billable |
| Q04.4 | Septo-optic dysplasia of brain | Billable |
| Q04.5 | Megalencephaly | Billable |
| Q04.6 | Congenital cerebral cysts | Billable |
| Q04.8 | Other specified congenital malformations of brain | Billable |
| Q04.9 | Congenital malformation of brain, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
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