FY2027 ICD-10-CM reference
Q03: Congenital hydrocephalus
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Congenital hydrocephalus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- Q03.0: Malformations of aqueduct of SylviusBillable code
- Q03.1: Atresia of foramina of Magendie and LuschkaBillable code
- Q03.8: Other congenital hydrocephalusBillable code
- Q03.9: Congenital hydrocephalus, unspecifiedBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
Codes from this chapter are not for use on maternal records
Source: Q00-QA1 (chapter, inherited).
Excludes2
inborn errors of metabolism (E70-E88)
Source: Q00-QA1 (chapter, inherited).
Includes
hydrocephalus in newborn
Source: Q03 (category, direct).
Excludes1
Arnold-Chiari syndrome, type II (Q07.0-)
Source: Q03 (category, direct).
Excludes1
acquired hydrocephalus (G91.-)
Source: Q03 (category, direct).
Excludes1
hydrocephalus due to congenital toxoplasmosis (P37.1)
Source: Q03 (category, direct).
Excludes1
hydrocephalus with spina bifida (Q05.0-Q05.4)
Source: Q03 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does Q03 mean in FY2027?
The official ICD-10-CM descriptor is Congenital hydrocephalus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is Q03 billable in FY2027?
The FY2027 order file marks Q03 as a nonbillable heading. Select a complete billable child code.
Does Q03 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition