Non-Billable / Non-Specific Code
ICD-10-CM Q03 is the diagnosis code for Congenital hydrocephalus. 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 Q03. They are mutually exclusive:
Understanding where Q03 sits in the ICD-10-CM classification helps ensure proper coding:
No, Q03 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
Q03 is the ICD-10-CM diagnosis code for "Congenital hydrocephalus". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
Q03 is located in Section Q00-Q07 — "Congenital malformations of the nervous system" within Chapter 17 of the ICD-10-CM Tabular List.
Q03 has 4 sub-code(s) that provide more specific detail: Q03.0, Q03.1, Q03.8, Q03.9.
Use Q03 when the patients documented diagnosis matches "Congenital hydrocephalus" 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 Congenital hydrocephalus is Q03.
No, Q03 is non-billable. Use a more specific sub-code for primary diagnosis billing.
Q03 is in Chapter 17 of the ICD-10-CM Tabular List.
Type 1 Excludes for Q03 include: Arnold-Chiari syndrome, type II (Q07.0-); acquired hydrocephalus (G91.-); hydrocephalus due to congenital toxoplasmosis (P37.1) and more.
Yes, Q03 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.