2024 ICD-10-CM Diagnosis Code Q04.6

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

• Absent tibia, polydactyly, arachnoid cyst syndrome
• Arachnoid cyst
• Arachnoid cyst
• Bilateral congenital cataract of eyes
• Cerebellar ataxia, intellectual disability, oculomotor apraxia, cerebellar cysts syndrome
• Cerebral arachnoid cyst
• Choroid plexus cyst
• Colloid brain cyst
• Colloid cyst of third ventricle
• Congenital cerebral cyst
• Congenital choroid plexus cyst
• Congenital malformation of the meninges
• Congenital malformation of the meninges
• Congenital porencephalic cyst
• Congenital porencephaly
• Congenital porencephaly
• Congenital porencephaly
• Congenital pseudoporencephaly
• Multiple congenital cerebral cysts
• Partial agenesis of corpus callosum
• Partial corpus callosum agenesis, cerebellar vermis hypoplasia with posterior fossa cysts syndrome
• Persistent Blake's pouch cyst
• Porencephalic cyst
• Porencephaly, cerebellar hypoplasia, internal malformations syndrome
• Porencephaly, microcephaly, bilateral congenital cataract syndrome
• Posterior fossa arachnoid cyst
• Pseudoporencephaly
• Schizencephaly
• Single congenital cerebral cyst

Clinical Information

• Schizencephaly

  cortical malformations characterized by grey matter-lined cleft or cyst that extends from the ependyma often to the pia mater outer surface. the grey matter that lines the cleft is often polymicrogyria. it is associated with developmental delay, motor disturbance and seizures.

• Schizencephaly

  a rare developmental abnormality characterized by the presence of clefs in the cerebral hemispheres. the abnormality may involve one or both cerebral hemispheres. signs and symptoms include developmental delays, mental retardation, paralysis, presence of a small head, and seizures.

• Porencephalic Cyst

  a congenital or acquired cystic cavity within the cerebral hemisphere.

Present on Admission (POA)

Q04.6 is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA Indicator	Reason for Code	CMS will pay the CC/MCC DRG?
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 - unable to clinically determine whether the condition was present at the time of inpatient admission.	YES
1	Unreported/Not used - Exempt from POA reporting.	NO

Convert Q04.6 to ICD-9-CM

• ICD-9-CM Code: 742.4 - Brain anomaly NEC
  Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

Brain Diseases

Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body. Your nerves take in information from your senses and send it to the brain to be processed. Your brain and nerves also communicate to help you move and to control your body's functions.

When the brain is healthy, it works quickly and automatically. But when you have a brain disease, it may affect how well you can function and do your daily activities. Some common brain diseases include:

• Brain tumors, which can press on nerves and affect brain function.
• Degenerative nerve diseases, which can affect many of your body's activities, such as balance, movement, talking, breathing, and heart function. Types include Alzheimer's disease and Parkinson's disease.
• Encephalitis (inflammation in the brain), which can lead to problems such as vision loss, weakness, and paralysis.
• Genetic brain disorders, which are caused by changes in genes (also called variants or mutations). These disorders can affect the development and function of the brain.
• Strokes, which can cause a loss of brain cells and can affect your ability to think clearly.
• Traumatic brain injuries (TBIs), which can affect brain function. They may range from mild to severe. The effects of a TBI may be temporary or permanent.

The symptoms of brain diseases vary widely, depending on the specific problem. In some cases, damage is permanent. In other cases, treatments such as surgery, medicines, or therapies such as physical, occupational, and speech therapies, may cure the disease or improve the symptoms.

[Learn More in MedlinePlus]

Familial porencephaly

Familial porencephaly is part of a group of conditions called the COL4A1-related disorders. The conditions in this group have a range of signs and symptoms that involve fragile blood vessels. In familial porencephaly, fluid-filled cysts develop in the brain (porencephaly) during fetal development or soon after birth. These cysts typically occur in only one side of the brain and vary in size. The cysts are thought to be the result of bleeding within the brain (hemorrhagic stroke). People with this condition also have leukoencephalopathy, which is a change in a type of brain tissue called white matter that can be seen with magnetic resonance imaging (MRI).

During infancy, people with familial porencephaly typically have paralysis affecting one side of the body (infantile hemiplegia). Affected individuals may also have recurrent seizures (epilepsy), migraine headaches, speech problems, intellectual disability, and uncontrolled muscle tensing (dystonia). Some people are severely affected, and others may have no symptoms related to the brain cysts.

[Learn More in MedlinePlus]

Code History

• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
• FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
• FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
• FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
• FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
• FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
• FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.