Q04Non-billableSave
Q04 - Other congenital malformations of brain
ICD-10-CM Chapter 17: Congenital malformations, deformations and chromosomal abnormalities · Q00-Q07 Congenital malformations of the nervous system (Q00-Q07) · Top-level category · FY2027
Coding Guidance
Q04 is a non-billable heading. Report one of the 9 more specific codes below.
Includes, Excludes and Coding Notes
Excludes 1 — Not Coded HereFrom Q04
Mutually exclusive: these conditions are never reported together with this code.
- cyclopia (Q87.0)
- macrocephaly (Q75.3)
Excludes 2 — Not Included HereFrom Chapter Q00-Q99
Not part of this code; report both codes when the patient has both conditions.
- inborn errors of metabolism (E70-E88)
NotesFrom Chapter Q00-Q99
Instructional notes from the ICD-10-CM tabular list.
- Codes from this chapter are not for use on maternal records
More Specific Codes (9)
Q04.0Congenital malformations of corpus callosumBillable→Q04.1ArhinencephalyBillable→Q04.2HoloprosencephalyBillable→Q04.3Other reduction deformities of brainBillable→Q04.4Septo-optic dysplasia of brainBillable→Q04.5MegalencephalyBillable→Q04.6Congenital cerebral cystsBillable→Q04.8Other specified congenital malformations of brainBillable→Q04.9Congenital malformation of brain, unspecifiedBillable→
Chapter Information
Chapter 17: Congenital malformations, deformations and chromosomal abnormalities
Range: Q00-Q99
View full chapterRelated ICD-10 Codes
More specific codes for Q04
Congenital malformations of corpus callosum
Q04.0›
ArhinencephalyQ04.1›
HoloprosencephalyQ04.2›
Other reduction deformities of brainQ04.3›
Septo-optic dysplasia of brainQ04.4›
MegalencephalyQ04.5›
Congenital cerebral cystsQ04.6›
Other specified congenital malformations of brainQ04.8›
Congenital malformation of brain, unspecifiedQ04.9›
Other categories in this chapter
Codes at the same level as Q04
- Anencephaly and similar malformationsQ00
- EncephaloceleQ01
- MicrocephalyQ02
- Congenital hydrocephalusQ03
- Spina bifidaQ05
- Other congenital malformations of spinal cordQ06
- Other congenital malformations of nervous systemQ07
- Congenital malformations of eyelid, lacrimal apparatus and orbitQ10
- Anophthalmos, microphthalmos and macrophthalmosQ11
- Congenital lens malformationsQ12
- Congenital malformations of anterior segment of eyeQ13
- Congenital malformations of posterior segment of eyeQ14
- Other congenital malformations of eyeQ15
- Congenital malformations of ear causing impairment of hearingQ16
- Other congenital malformations of earQ17
- Other congenital malformations of face and neckQ18
- Congenital malformations of cardiac chambers and connectionsQ20
- Congenital malformations of cardiac septaQ21
- Congenital malformations of pulmonary and tricuspid valvesQ22
- Congenital malformations of aortic and mitral valvesQ23
- Other congenital malformations of heartQ24
- Congenital malformations of great arteriesQ25
- Congenital malformations of great veinsQ26
- Other congenital malformations of peripheral vascular systemQ27
- Other congenital malformations of circulatory systemQ28
- Congenital malformations of noseQ30
- Congenital malformations of larynxQ31
- Congenital malformations of trachea and bronchusQ32
- Congenital malformations of lungQ33
- Other congenital malformations of respiratory systemQ34
- Cleft palateQ35
- Cleft lipQ36
- Cleft palate with cleft lipQ37
- Other congenital malformations of tongue, mouth and pharynxQ38
- Congenital malformations of esophagusQ39
- Other congenital malformations of upper alimentary tractQ40
- Congenital absence, atresia and stenosis of small intestineQ41
- Congenital absence, atresia and stenosis of large intestineQ42
- Other congenital malformations of intestineQ43
- Congenital malformations of gallbladder, bile ducts and liverQ44
48 more in this chapter.