ICD-10-CM
Q04.3 - Other reduction deformities of brain
Code
Q04.3 - Other reduction deformities of brain
[Billable] [POA Exempt]
[Billable] [POA Exempt]
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
Not Coded Here
- congenital malformations of corpus callosum (Q04.0)
Code Tree
Q00-QA0 - Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Q00-Q07 - Congenital malformations of the nervous system
- Q04 - Other congenital malformations of brain
- Q04.0 - Congenital malformations of corpus callosum
- Q04.1 - Arhinencephaly
- Q04.2 - Holoprosencephaly
- Q04.3 - Other reduction deformities of brain
- Q04.4 - Septo-optic dysplasia of brain
- Q04.5 - Megalencephaly
- Q04.6 - Congenital cerebral cysts
- Q04.8 - Other specified congenital malformations of brain
- Q04.9 - Congenital malformation of brain, unspecified
- Q04 - Other congenital malformations of brain
Citation
"Q04.3 - Other Reduction Deformities of Brain." ICD-10-CM, 10th ed., Centers for Medicare and Medicaid Services and the National Center for Health Statistics, 2026. www.unboundmedicine.com/icd/view/ICD-10-CM/889164/all/Q04_3___Other_reduction_deformities_of_brain.
Q04.3 - Other reduction deformities of brain. ICD-10-CM. Centers for Medicare and Medicaid Services and the National Center for Health Statistics; 2026. https://www.unboundmedicine.com/icd/view/ICD-10-CM/889164/all/Q04_3___Other_reduction_deformities_of_brain. Accessed June 4, 2026.
Q04.3 - Other reduction deformities of brain. (2026). In ICD-10-CM (10th ed.). Centers for Medicare and Medicaid Services and the National Center for Health Statistics. https://www.unboundmedicine.com/icd/view/ICD-10-CM/889164/all/Q04_3___Other_reduction_deformities_of_brain
Q04.3 - Other Reduction Deformities of Brain [Internet]. In: ICD-10-CM. Centers for Medicare and Medicaid Services and the National Center for Health Statistics; 2026. [cited 2026 June 04]. Available from: https://www.unboundmedicine.com/icd/view/ICD-10-CM/889164/all/Q04_3___Other_reduction_deformities_of_brain.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC
T1 - Q04.3 - Other reduction deformities of brain
ID - 889164
BT - ICD-10-CM
UR - https://www.unboundmedicine.com/icd/view/ICD-10-CM/889164/all/Q04_3___Other_reduction_deformities_of_brain
PB - Centers for Medicare and Medicaid Services and the National Center for Health Statistics
ET - 10
DB - ICD-10-CM
DP - Unbound Medicine
ER -
