All ICD10 Codes

Q04

Non-Billable
ChapterQ00–Q99
Rankcategory
Official Description

Other congenital malformations of brain

Use a more specific code (9 billable)
Q04.0Congenital malformations of corpus callosumQ04.1ArhinencephalyQ04.2HoloprosencephalyQ04.3Other reduction deformities of brainQ04.4Septo-optic dysplasia of brainQ04.5MegalencephalyQ04.6Congenital cerebral cystsQ04.8Other specified congenital malformations of brainQ04.9Congenital malformation of brain, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

CH17 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)

Instructional Notes

Excludes1(Not coded here. Use a different code.)

Clinical Hierarchy

BillableHas subcodes
CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
Q00-Q07Congenital malformations of the nervous system (Q00-Q07)
Q04Other congenital malformations of brainNot billable
Q04.0Congenital malformations of corpus callosumBillable
Q04.1ArhinencephalyBillable
Q04.2HoloprosencephalyBillable
Q04.3Other reduction deformities of brainBillable
Q04.4Septo-optic dysplasia of brainBillable
Q04.5MegalencephalyBillable
Q04.6Congenital cerebral cystsBillable
Q04.8Other specified congenital malformations of brainBillable
Q04.9Congenital malformation of brain, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q04:

chapterCH17
Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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