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  6. 2024 ICD-10-CM Code Q04
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code Q04

Other congenital malformations of brain

ICD-10-CM Code:
Q04
ICD-10 Code for:
Other congenital malformations of brain
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Congenital malformations, deformations and chromosomal abnormalities
    (Q00-Q99)
    • Congenital malformations of the nervous system
      (Q00-Q07)
      • Other congenital malformations of brain
        (Q04)

Q04 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other congenital malformations of brain. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Other congenital malformations of brain

Non-specific codes like Q04 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for other congenital malformations of brain:

  • Use Q04.0 for Congenital malformations of corpus callosum - BILLABLE CODE

  • Use Q04.1 for Arhinencephaly - BILLABLE CODE

  • Use Q04.2 for Holoprosencephaly - BILLABLE CODE

  • Use Q04.3 for Other reduction deformities of brain - BILLABLE CODE

  • Use Q04.4 for Septo-optic dysplasia of brain - BILLABLE CODE

  • Use Q04.5 for Megalencephaly - BILLABLE CODE

  • Use Q04.6 for Congenital cerebral cysts - BILLABLE CODE

  • Use Q04.8 for Other specified congenital malformations of brain - BILLABLE CODE

  • Use Q04.9 for Congenital malformation of brain, unspecified - BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Patient Education


Brain Malformations

Most 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 problem. In many cases, treatment only helps with symptoms. It may include antiseizure medicines, shunts to drain fluid from the brain, and physical therapy.

There are head malformations that do not involve the brain. Craniofacial disorders are the result of abnormal growth of soft tissue and bones in the face and head. It's common for new babies to have slightly uneven heads, but parents should watch the shape of their baby's head for possible problems.

NIH: National Institute of Neurological Disorders and Stroke


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.