Q03
Congenital hydrocephalus
Q03 is a non-billable ICD-10-CM code category for congenital hydrocephalus. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Q03.0 Malformations of aqueduct of Sylvius; Q03.1 Atresia of foramina of Magendie and Luschka; Q03.8 Other congenital hydrocephalus and Q03.9 Congenital hydrocephalus, unspecified. Its coding notes include 4 Excludes1 entries and 1 Excludes2 entry.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (1 note)
- inborn errors of metabolism (E70-E88)
Includes
Further defines or gives examples of the content of the category.
- hydrocephalus in newborn
Notes
Also from chapter/block level (1 note)
- Codes from this chapter are not for use on maternal records