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Q04.3 - Other reduction deformities of brain


The ICD 10 Code for Other reduction deformities of brain is listed as Q04.3.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field Value
Diagnosis Code: Q04.3
Description: Other reduction deformities of brain
  • 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: congenital malformations of corpus callosum (Q04.0)
Diagnostic Related Groups
(MS-DRG v30.0)
091 - Other Disorders Of Nervous System W Mcc
092 - Other Disorders Of Nervous System W Cc
093 - Other Disorders Of Nervous System W/o Cc/mcc
793 - Full Term Neonate W Major Problems
Chapter Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Block Congenital malformations of the nervous system (Q00-Q07)
Parent Q04 - Other congenital malformations of brain
ICD-9-CM Diagnosis Codes General Equivalence Mappings (GEMS):
ICD 9 Dx Code: 742.2 - Congenital reduction deformities of brain (approximate)
ICD-10-CM Siblings (same level / similar specificity) of Q04.3:
Q04.0 - Congenital malformations of corpus callosum
Q04.1 - Arhinencephaly
Q04.2 - Holoprosencephaly
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