Q04.9
Billable codeCongenital malformation of brain, unspecified
The ICD-10 code for congenital malformation of brain, unspecified is Q04.9.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Congenital anomaly NOS of brain
- Congenital deformity NOS of brain
- Congenital disease or lesion NOS of brain
- Multiple anomalies NOS of brain, congenital
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Q04.0Congenital malformations of corpus callosum
- Q04.1Arhinencephaly
- 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
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 7429Approximate match
Associated MS-DRGs
Q04.9 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.