Q04.9

Congenital malformation of brain, unspecified

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

CMS-HCC V28

HCC182

Spinal Cord Disorders/Injuries

CMS-HCC ESRD V24

HCC72

Spinal Cord Disorders/Injuries

RxHCC V08

RXHCC155

Spinal Cord Disorders

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · Q04.9

Synonyms

Congenital anomaly NOS of brain Congenital deformity NOS of brain Congenital disease or lesion NOS of brain Multiple anomalies NOS of brain, congenital

Inherited from Q04Other congenital malformations of brain

Excludes 1

cyclopia (Q87.0) macrocephaly (Q75.3)

Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities

Excludes 2

inborn errors of metabolism (E70-E88)

Note

Codes from this chapter are not for use on maternal records

Official Guidelines for Q04.9

FY 2026 ›

I.C.17Chapter-specific guidanceChapter 17: Congenital malformations, deformations, and chromosomal abnormalities (Q00-QA1)

Sections that reference Q04.9

IV.QEncounters for routine health screeningsOutpatient services
… Congenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. …

Sections whose FY 2026 text names Q04.9, its Q04 category, or a range containing it — the chapter guidance above is the authoritative source.

Find Q04.9 in the alphabetic index

12 index paths lead to this code