Non-Billable / Non-Specific Code
ICD-10-CM Q04 is the diagnosis code for Other congenital malformations of brain. This code falls under the section "Congenital malformations of the nervous system" within Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as Q04. They are mutually exclusive:
Understanding where Q04 sits in the ICD-10-CM classification helps ensure proper coding:
No, Q04 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
Q04 is the ICD-10-CM diagnosis code for "Other congenital malformations of brain". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
Q04 is located in Section Q00-Q07 — "Congenital malformations of the nervous system" within Chapter 17 of the ICD-10-CM Tabular List.
Q04 has 9 sub-code(s) that provide more specific detail: Q04.0, Q04.1, Q04.2, Q04.3, Q04.4 and more.
Use Q04 when the patients documented diagnosis matches "Other congenital malformations of brain" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Other congenital malformations of brain is Q04.
No, Q04 is non-billable. Use a more specific sub-code for primary diagnosis billing.
Q04 is in Chapter 17 of the ICD-10-CM Tabular List.
Type 1 Excludes for Q04 include: cyclopia (Q87.0); macrocephaly (Q75.3).
Yes, Q04 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.