Q04.5
BillableMegalencephaly
Megalencephaly
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
Related Codes(8)
Q04.0Congenital malformations of corpus callosum
Q04.1Arhinencephaly
Q04.2Holoprosencephaly
Q04.3Other reduction deformities of brain
Q04.4Septo-optic dysplasia of brain
Q04.6Congenital cerebral cysts
Q04.8Other specified congenital malformations of brain
Q04.9Congenital malformation of brain, unspecified
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(53)
SNOMED CT
- Macroencephaly9740002
- Megalencephaly9740002
- Familial megalencephaly253168004
- Sporadic megalencephaly253169007
- Hemimegalencephaly253170008
- Infantile leucoencephalopathy and megalencephaly703536004
- Infantile leukoencephalopathy and megalencephaly703536004
- Leucoencephalopathy with swelling and cysts703536004
- Leukoencephalopathy with swelling and cysts703536004
- Megalencephalic leucoencephalopathy with subcortical cysts703536004
- Megalencephalic leukoencephalopathy with subcortical cysts703536004
- Vacuolating leucoencephalopathy703536004
- Vacuolating leukoencephalopathy703536004
- Vacuolating megalencephalic leucoencephalopathy with subcortical cysts703536004
- Vacuolating megalencephalic leukoencephalopathy with subcortical cysts703536004
- Van der Knapp disease703536004
- MPPH (megalencephaly, polymicrogyria, polydactyly, hydrocephalus) syndrome722036008
- MPPH syndrome722036008
- Megalencephaly, polymicrogyria, postaxial polydactyly, hydrocephalus syndrome722036008
- Bilateral megalencephaly879919001
- PMSE (polyhydramnios, megalencephaly, symptomatic epilepsy) syndrome1167371007
- Polyhydramnios, megalencephaly, symptomatic epilepsy syndrome1167371007
- Megalencephaly, severe kyphoscoliosis, overgrowth syndrome1260143005
UMLS
Clinical Terms
- Megalencephalic leukoencephalopathy with subcortical cysts
- Megalencephalic leucoencephalopathy with subcortical cysts
- Leucoencephalopathy with swelling and cysts
- Infantile leucoencephalopathy and megalencephaly
- PMSE (polyhydramnios, megalencephaly, symptomatic epilepsy) syndrome
- Familial megalencephaly
- Hemimegalencephaly
- Macroencephaly (disorder)
- Leukoencephalopathy with swelling and cysts
- Vacuolating leucoencephalopathy
- Bilateral megalencephaly
- Polyhydramnios, megalencephaly, symptomatic epilepsy syndrome
- Megalencephaly, severe kyphoscoliosis, overgrowth syndrome
- Van der Knapp disease
- Macroencephaly
- Sporadic megalencephaly
- Vacuolating megalencephalic leukoencephalopathy with subcortical cysts
- MPPH (megalencephaly, polymicrogyria, polydactyly, hydrocephalus) syndrome
- Vacuolating leukoencephalopathy
- MPPH syndrome
- Enlarged brain
- Vacuolating megalencephalic leucoencephalopathy with subcortical cysts
- Infantile leukoencephalopathy and megalencephaly
- Megalencephaly, polymicrogyria, postaxial polydactyly, hydrocephalus syndrome
- Macrencephaly
Frequently Asked Questions
What is the ICD-10 code for megalencephaly?
The ICD-10-CM code for megalencephaly is Q04.5. The full clinical description is "Megalencephaly". Q04.5 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code Q04.5 mean?
ICD-10-CM code Q04.5 represents “Megalencephaly”. It is classified under Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities and is a billable/specific code that can be used on a claim.
Is Q04.5 a billable code?
Yes, Q04.5 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is Q04.5 in?
Q04.5 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).
What codes cannot be used with Q04.5?
Q04.5 has Excludes1 notes indicating codes that cannot be used together with it, including: cyclopia (Q87.0); macrocephaly (Q75.3).
What SNOMED CT codes does Q04.5 map to?
Q04.5 maps to 9 SNOMED CT concepts: 879919001, 253168004, 253170008, 703536004, 722036008, and 4 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for Q04.5?
Q04.5 is linked to 1 UMLS Concept Unique Identifier: C2720434. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does Q04.5 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like megalencephaly affect a person's functioning: body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of Q04.5?
Q04.5 maps to the ICD-11 code: LA05.1 (Megalencephaly).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.