2024 ICD-10-CM Diagnosis Code Q04.9

Approximate Synonyms

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

• Anomalies of cerebellum
• Aplasia cutis congenita secondary to malformation syndrome
• Bilateral renal hypoplasia
• Brain malformation, congenital heart disease, postaxial polydactyly syndrome
• Brain malformations, musculoskeletal abnormalities, facial dysmorphism, intellectual disability syndrome
• BRESEK syndrome
• Cerebellar cortical dysplasia
• Cerebro-costo-mandibular syndrome
• Cerebrofacioarticular syndrome
• Choreoathetosis
• CODAS syndrome
• Combined malformation of central nervous system and skeletal muscle
• Congenital anomaly of brain
• Congenital anomaly of cerebrum
• Congenital atresia of duodenum
• Congenital brain damage
• Congenital corneal dystrophy
• Congenital hypotrichia
• Congenital labioscrotal agenesis, cerebellar malformation, corneal dystrophy, facial dysmorphism syndrome
• Congenital muscular hypertrophy-cerebral syndrome
• Diplegia
• Disorder of ornithine metabolism
• Dysplasia with defective mineralization
• Early-onset epilepsy, intellectual disability, brain anomalies syndrome
• Endocrine-cerebro-osteodysplasia syndrome
• Epilepsy due to congenital anomaly of brain
• Familial visceral neuropathy
• Focal epilepsy, intellectual disability, cerebro-cerebellar malformation syndrome
• Global developmental delay, alopecia, macrocephaly, facial dysmorphism, structural brain anomalies syndrome
• Hypernatremia
• Intellectual disability, obesity, brain malformation, facial dysmorphism syndrome
• Left renal hypoplasia
• Lethal brain and heart developmental defects syndrome
• Lethal fetal brain malformation, duodenal atresia, bilateral renal hypoplasia syndrome
• Leukoencephalopathy, thalamus and brainstem anomalies, high lactate syndrome
• Linear hypopigmentation and craniofacial asymmetry with acral, ocular and brain anomalies
• Microcephalus, brain defect, spasticity, hypernatremia syndrome
• Microphthalmia with brain and digit anomaly
• Microphthalmos due to Delleman syndrome
• Mitochondrial DNA depletion syndrome hepatocerebrorenal form
• Multiple brain anomalies
• Muscle eye brain disease with bilateral multicystic leukodystrophy
• Oculocerebrocutaneous syndrome
• Oculocerebrodental syndrome
• Oculopalatocerebral syndrome
• Persistent hyperplastic primary vitreous
• Right renal hypoplasia
• Severe oculo-renal-cerebellar syndrome
• Spastic diplegia
• Spastic paralysis
• Visceral neuropathy and brain anomaly with facial dysmorphism and developmental delay syndrome
• X-linked cerebral, cerebellar, coloboma syndrome

Clinical Information

• Persistent Hyperplastic Primary Vitreous

  a developmental ocular anomaly in which the primary vitreous body and its surrounding hyaloid vasculature failed to regress. it is usually unilateral and characterized by cataract; microphthalmos (small eyeballs), and retrolenticular fibrovascular tissue. (from yanoff: ophthalmology, 2nd ed.)

• Hypernatremia

  excessive amount of sodium in the blood. (dorland, 27th ed)

• Brachial Amyotrophic Diplegia|BAD|FAS|Flail Arm Syndrome|MIBS|Man-in-barrel Syndrome

  a neurodegenerative condition characterized by asymmetric weakness in the upper extremities resulting from segmental lower motor neuron dysfunction.

• Diplegia

  paralysis affecting corresponding parts on both sides of the body.

• Diplegia of Upper Limbs|Diplegia of upper limbs

  evidence of diplegia of the upper limbs.

• Neurodevelopmental Disorder with Spastic Diplegia and Visual Defects|MRD19|Mental Retardation, Autosomal Dominant 19|NEDSDV

  an autosomal dominant condition caused by mutation(s) in the ctnnb1 gene, encoding catenin beta-1. it is characterized by severe intellectual disability, progressive spastic diplegia, visual impairment, and dysmorphic craniofacial features.

• Quadriplegia|Bilateral Diplegia|Bilateral Diplegia|Quadriplegia, unspecified|Tetraplegia

  paralysis of all four limbs.

• Spastic Diplegia|Little's Disease|Spastic diplegic cerebral palsy

  a type of cerebral palsy characterized by spasticity and hypertonia of the lower extremities bilaterally, particularly the legs, hips, and pelvis; this is the most common (70%) form of cerebral palsy.

• Codas Syndrome

  a rare syndrome caused by mutations in the lonp1 gene. it is characterized by developmental delay, cerebral, ocular, dental, auricular, and skeletal abnormalities.

• Grade 1 Hypernatremia, CTCAE|Grade 1 Hypernatremia

  >uln-150 mmol/l

• Grade 2 Hypernatremia, CTCAE|Grade 2 Hypernatremia

  >150-155 mmol/l; intervention initiated

• Grade 3 Hypernatremia, CTCAE|Grade 3 Hypernatremia

  >155-160 mmol/l; hospitalization indicated

• Grade 4 Hypernatremia, CTCAE|Grade 4 Hypernatremia

  >160 mmol/l; life-threatening consequences

• Grade 5 Hypernatremia, CTCAE|Grade 5 Hypernatremia

  death

• Hypernatremia

  higher than normal levels of sodium in the circulating blood.

• Hypernatremia, CTCAE|Hypernatremia|Hypernatremia

  a disorder characterized by laboratory test results that indicate an elevation in the concentration of sodium in the blood.

Present on Admission (POA)

Q04.9 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 Q04.9 to ICD-9-CM

• ICD-9-CM Code: 742.9 - Nervous system anom NOS
  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 Malformations

Most brain malformations begin long before a baby is born. Something damages the developing nervous system or causes it to develop abnormally. Sometimes it's a genetic problem. In other cases, exposure to certain medicines, infections, or radiation during pregnancy interferes with brain development. Parts of the brain may be missing, abnormally small or large, or not fully developed.

Treatment depends upon the problem. In many cases, treatment only helps with symptoms. It may include antiseizure medicines, shunts to drain fluid from the brain, and physical therapy.

There are head malformations that do not involve the brain. Craniofacial disorders are the result of abnormal growth of soft tissue and bones in the face and head. It's common for new babies to have slightly uneven heads, but parents should watch the shape of their baby's head for possible problems.

NIH: National Institute of Neurological Disorders and Stroke

[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.