Q04.6

Billable

ChapterQ00–Q99

Ranksubcategory

Official Description

Congenital cerebral cysts

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

Instructional Notes

Includes

Porencephaly
Schizencephaly

Excludes1(Not coded here)

acquired porencephalic cyst (G93.0)

General instructions are available for the parent sections:

View CH17 Notes View Q04 Notes

Clinical Hierarchy

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

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

Q04Other congenital malformations of brain

Q04.6Congenital cerebral cysts

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q04.6:

categoryQ04

Other congenital malformations of brain

View context instructions

chapterCH17

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

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to Q04.6. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

9 raw paths

Cyst (colloid) (mucous) (simple) (retention)6 unique routes

arachnoid, brain (acquired)

congenital→Q04.6

brain (acquired)(2 variants)

congenital→Q04.6

third ventricle (colloid), congenital→Q04.6

choroid plexus

congenital→Q04.6

paraphysis, cerebri, congenital→Q04.6

porencephalic→Q04.6

Degeneration, degenerative1 unique routes