ICD-10-CM Code Q04.5
Billable CodeBillable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
POA Exempt CodeThe Center for Medicare & Medicaid Services (CMS) requires medical coders to indicate whether or not a condition was present at the time of admission, in order to properly assign MS-DRG codes. This "Present On Admission" (POA) indicator is recorded on CMS form 4010A.
Q04.5 is a billable ICD code used to specify a diagnosis of megalencephaly. A 'billable code' is detailed enough to be used to specify a medical diagnosis.
POA Indicators on CMS form 4010A are as follows:
|Indicator||Meaning||CMS Will Pay CC/MCC DRG Costs|
|Y||Diagnosis was present at time of inpatient admission||Yes|
|N||Diagnosis was not present at time of inpatient admission||No|
|U||Documentation insufficient to determine if the condition was present at the time of inpatient admission.||No|
|W||Clinically undetermined. Provider unable to clinically determine whether the condition was present at the time of inpatient admission.||Yes|
|1||Exempt from POA reporting||No|
The ICD code Q045 is used to code Megalencephaly
Megalencephaly (or macrencephaly, abbreviated MEG) is a growth development disorder in which the brain is abnormally large. It is characterized by a brain with an average weight that is 2.5 standard deviations from the mean of the general population. Megalencephaly is usually diagnosed at birth and is confirmed with an MRI. A mutation in the PI3K-AKT pathway is believed to be the primary cause of brain proliferation and ultimately the root cause of megalencephaly. This mutation has produced a classification of brain overdevelopment that consists of two syndromes including, megalencephaly-capillary malformation (MCAP) and megalencephaly-polydactyly-polymicrogyria-hydrocephalus (MPPH). Approximately 1 out of 50 children (2%) are said to have the characteristics of megalencephaly in the general population. There are several neuropsychiatric disorders linked with megalencephaly, however, studies have shown that autism is the most prevalent association with the malformation of MEG. Although no treatment currently exists for megalencephaly, management methods are focused at reducing deficits linked with autism. Most recent research is targeted at creating inhibitors to reduce the mutational pathway that causes megalencephaly.
|ICD 9 Code:||742.4|
- DRG Group #091-093 - Other disorders of nervous system with MCC.
- DRG Group #091-093 - Other disorders of nervous system with CC.
- DRG Group #091-093 - Other disorders of nervous system without CC or MCC.
- DRG Group #793 - Full term neonate with major problems.
ICD-10-CM Alphabetical Index References for 'Q04.5 - Megalencephaly'
The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code Q04.5. Click on any term below to browse the alphabetical index.
Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)
This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code Q04.5 and a single ICD9 code, 742.4 is an approximate match for comparison and conversion purposes.
Parent Code: Q04 - Other congenital malformations of brain