Q03: Congenital hydrocephalus
Codes under Q03 (Congenital hydrocephalus). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q03.0 | Malformations of aqueduct of Sylvius | ✓ |
| Q03.0 | Malformations of aqueduct of Sylvius | ✓ |
| Q03.1 | Atresia of foramina of Magendie and Luschka | ✓ |
| Q03.1 | Atresia of foramina of Magendie and Luschka | ✓ |
| Q03.8 | Other congenital hydrocephalus | ✓ |
| Q03.8 | Other congenital hydrocephalus | ✓ |
| Q03.9 | Congenital hydrocephalus, unspecified | ✓ |
| Q03.9 | Congenital hydrocephalus, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code Q03?
Q03 is an ICD-10-CM category covering Congenital hydrocephalus. It contains 8 more specific diagnosis codes, 8 of which are billable.
Is Q03 a billable code?
No — Q03 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Q03.0 — Malformations of aqueduct of Sylvius). 8 of the 8 codes under Q03 are billable.
What codes fall under Q03?
Q03 includes Q03.0, Q03.0, Q03.1, Q03.1, Q03.8, plus 3 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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