Is ICD-10-CM code Q03 billable?

No, Q03 (Congenital hydrocephalus) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code Q03 belong to?

Q03 belongs to Chapter 17 of the ICD-10-CM tabular list: Q00–Q99 (Congenital Malformations, Deformations and Chromosomal Abnormalities).

Q03

Non-Billable

ChapterQ00–Q99

Rankcategory

Description

Congenital hydrocephalus

About ICD-10-CM code Q03

Q03 is the ICD-10-CM diagnosis code for Congenital hydrocephalus. It sits in Q00-Q99 Congenital Malformations, Deformations and Chromosomal Abnormalities, within Congenital malformations of the nervous system (Q00-Q07). Q03 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (4 billable)

Q03.0Malformations of aqueduct of Sylvius Q03.1Atresia of foramina of Magendie and Luschka Q03.8Other congenital hydrocephalus Q03.9Congenital hydrocephalus, unspecified

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

CH17 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

inborn errors of metabolism (E70-E88)

Instructional Notes

Includes

hydrocephalus in newborn

Excludes1(Not coded here. Use a different code.)

Arnold-Chiari syndrome, type II (Q07.0-)
acquired hydrocephalus (G91.-)
hydrocephalus due to congenital toxoplasmosis (P37.1)
hydrocephalus with spina bifida (Q05.0-Q05.4)

Clinical Hierarchy

BillableHas subcodes

CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Q00-Q07Congenital malformations of the nervous system (Q00-Q07)

Q03Congenital hydrocephalusNot billable

Q03.0Malformations of aqueduct of SylviusBillable

Q03.1Atresia of foramina of Magendie and LuschkaBillable

Q03.8Other congenital hydrocephalusBillable

Q03.9Congenital hydrocephalus, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q03:

chapterCH17

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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