Q03.9 – Congenital hydrocephalus, unspecified
ICD-10-CM 2027 diagnosis code · Congenital malformations of the nervous system
ICD-10-CM code
Q03.9
- Code
Q03.9(claims format:Q039)- Description
- Congenital hydrocephalus, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- Block
- Q00-Q07 Congenital malformations of the nervous system
- Parent codes
- Q03
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Q03 – Congenital hydrocephalus
Includes:
- hydrocephalus in newborn
Index terms for Q03.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Hydrocephalus, newborn
- Hydrocephalus, congenital
- Agenesis, skull, with, hydrocephalus
- Absence, skull bone, with, hydrocephalus
- Distortion, skull bone, with, hydrocephalus
- Anomaly, anomalous, skull, with, hydrocephalus
- Imperfect, closure, skull, with, hydrocephalus
- Deformity, skull, congenital, with, hydrocephalus
- Hypoplasia, hypoplastic, skull, with, hydrocephalus
- Anomaly, anomalous, bone, skull, with, hydrocephalus
- Degeneration, degenerative, brain, in, congenital hydrocephalus
Related codes in Q03
Frequently asked questions
What is ICD-10 code Q03.9?
Q03.9 is the ICD-10-CM code for congenital hydrocephalus, unspecified, in the block Q00-Q07 (Congenital malformations of the nervous system).
Is Q03.9 a billable code?
Yes. Q03.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does Q03.9 belong to?
It belongs to category Q03 – Congenital hydrocephalus.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.