Q04.3
BillableOther reduction deformities of brain
Q04.3 is the ICD-10-CM code for Other reduction deformities of brain. It is a billable, specific code valid for reimbursement.
Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
What this means — in plain language
MedlinePlus · NIHMost brain malformations begin long before a baby is born. Something damages the developing nervous system or causes it to develop abnormally. Sometimes it's a genetic problem. In other cases, exposure to certain medicines , infections , or radiation during pregnancy interferes with brain development. Parts of the brain may be missing, abnormally small or large, or not fully developed. Treatment depends upon the…
Read more about Brain Malformations at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •Absence of part of brain
- •Agenesis of part of brain
- •Agyria
- •Aplasia of part of brain
- •Hydranencephaly
- •Hypoplasia of part of brain
- •Lissencephaly
- •Microgyria
- •Pachygyria
Excludes1 — not coded here
- •congenital malformations of corpus callosum (Q04.0)
Frequently asked questions
- What is ICD-10 code Q04.3?
- Q04.3 is the ICD-10-CM code for "Other reduction deformities of brain". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
- Is Q04.3 a billable code?
- Yes — Q04.3 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from Q04.3?
- Excludes1 (not coded here): congenital malformations of corpus callosum (Q04.0).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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