2024 ICD-10-CM Diagnosis Code Q07.9

Congenital malformation of nervous system, unspecified

Short Description:
Congenital malformation of nervous system, unspecified
Is Billable?
Yes - Valid for Submission
Code Navigator:

Code Classification

  • Congenital malformations, deformations and chromosomal abnormalities
    • Congenital malformations of the nervous system
      • Other congenital malformations of nervous system

Q07.9 is a billable diagnosis code used to specify a medical diagnosis of congenital malformation of nervous system, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

Unspecified diagnosis codes like Q07.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

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

  • Cerebrofacial dysplasia
  • Coenzyme Q10 deficiency
  • Combined malformation of central nervous system and skeletal muscle
  • Combined malformation of central nervous system and skeletal muscle
  • Congenital anomaly of central nervous system
  • Congenital anomaly of nervous system
  • Congenital anomaly of nervous system of head/neck
  • Congenital anomaly of neural structure of trunk
  • Congenital anomaly of peripheral nerve
  • Congenital anomaly of the peripheral nervous system
  • Congenital hepatic fibrosis
  • Congenital malformation of autonomic nervous system
  • Congenital malformation of the meninges
  • Congenital polyneuropathy
  • Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation
  • Cortical dysplasia
  • Crome syndrome
  • Cyprus facial neuromusculoskeletal syndrome
  • Ectodermal dysplasia, intellectual disability, central nervous system malformation syndrome
  • Encephalopathy, hypertrophic cardiomyopathy, renal tubular disease syndrome
  • FBLN1-related developmental delay, central nervous system anomaly, syndactyly syndrome
  • Global developmental delay, neuro-ophthalmological abnormalities, seizures, intellectual disability syndrome
  • HIVEP2-related intellectual disability
  • Hypertrophic mitochondrial cardiomyopathy
  • Hypoplasia of optic nerve due to central nervous system malformation
  • Immature autonomic system
  • Male emopamil-binding protein disorder with neurological defect
  • Muscle eye brain disease
  • Muscle-eye-brain disease, congenital muscular dystrophy
  • Navajo neurohepatopathy
  • Neural tube defect
  • Neurofaciodigitorenal syndrome
  • NPHP3-related Meckel-like syndrome
  • Pili torti
  • Pili torti with developmental delay and neurological abnormality syndrome
  • SCALP syndrome
  • Sebaceous nevus
  • Vascular malformation of the nervous system

Clinical Information

  • ACD Gene Mutation|ACD, Shelterin Complex Subunit and Telomerase Recruitment Factor Gene Mutation|Adrenocortical Dysplasia Homolog (Mouse) Gene Mutation|PIP1 Gene Mutation|PTOP Gene Mutation|TINT1 Gene Mutation|TPP1 Gene Mutation-. a change in the nucleotide sequence of the acd gene.
  • ACD wt Allele|ACD, Mouse, Homolog of Gene|ACD, Shelterin Complex Subunit and Telomerase Recruitment Factor wt Allele|Adrenocortical Dysplasia Homolog (Mouse) Gene|PIP1|PTOP|TPP1-. human acd wild-type allele is located in the vicinity of 16q22.1 and is approximately 3 kb in length. this allele, which encodes adrenocortical dysplasia protein homolog, is involved in telomere protection.
  • Adrenocortical Dysplasia Protein Homolog|ACD|POT1 and TIN2 Organizing Protein|POT1 and TIN2-Interacting Protein|POT1- and TIN2- Organizing Protein|POT1-Interacting Protein 1|TIN2 Interacting Protein 1|TIN2-Interacting Protein 1|Telomere Protein TPP1-. adrenocortical dysplasia protein homolog (544 aa, ~58 kda) is encoded by the human acd gene. this protein plays a role in both the elongation and maintenance of telomeres.
  • Complex Cortical Dysplasia with other Brain Malformations 5|CDCBM5|TUBB2A Tubulinopathy-. an autosomal dominant condition caused by mutation(s) in the tubb2a gene, encoding tubulin beta-2a chain. it is characterized by cortical dysplasia and is associated with impaired intellectual development, hypotonia, global developmental delay, cortical dysplasia, and dysmorphic corpus callosum.
  • Cortical Dysplasia-. malformation of the cerebral cortex due to improper migration of neurons in utero.
  • Cortical Dysplasia-Focal Epilepsy Syndrome|CDFE Syndrome-. an autosomal recessive condition caused by mutation(s) in the cntnap2 gene, encoding contactin-associated protein-like 2. it is characterized by normal development until the onset of intractable focal seizures at age 1-9. after the onset of seizures, language regression, intellectual disability, hyperactivity, and impulsive behaviors begin to occur. the majority of children eventually fulfill the criteria for autism spectrum disorder.
  • Coenzyme Q10 Deficiency-. a genetically heterogeneous condition, typically inherited in an autosomal recessive fashion, characterized by coenzyme q10 deficiency.
  • Congenital Hepatic Fibrosis-. a congenital disorder usually inherited in an autosomal recessive pattern. it affects the hepatobiliary system and the kidneys. it is characterized by liver fibrosis, portal hypertension, and renal cysts.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Congenital anomaly NOS of nervous system
  • Congenital deformity NOS of nervous system
  • Congenital disease or lesion NOS of nervous system

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Present on Admission (POA)

Q07.9 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 IndicatorReason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Convert to ICD-9-CM Code

Source ICD-10-CM CodeTarget ICD-9-CM Code
Q07.9742.9 - 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]

Neural Tube Defects

Neural tube defects are birth defects of the brain, spine, or spinal cord. They happen in the first month of pregnancy, often before a woman even knows that she is pregnant. The two most common neural tube defects are spina bifida and anencephaly. In spina bifida, the fetal spinal column doesn't close completely. There is usually nerve damage that causes at least some paralysis of the legs. In anencephaly, most of the brain and skull do not develop. Babies with anencephaly are usually either stillborn or die shortly after birth. Another type of defect, Chiari malformation, causes the brain tissue to extend into the spinal canal.

The exact causes of neural tube defects aren't known. You're at greater risk of having an infant with a neural tube defect if you:

  • Have obesity
  • Have poorly controlled diabetes
  • Take certain antiseizure medicines

Getting enough folic acid, a type of B vitamin, before and during pregnancy prevents most neural tube defects.

Neural tube defects are usually diagnosed before the infant is born, through lab or imaging tests. There is no cure for neural tube defects. The nerve damage and loss of function that are present at birth are usually permanent. However, a variety of treatments can sometimes prevent further damage and help with complications.

NIH: National Institute of Child Health and Human Development

[Learn More in MedlinePlus]

Spinal Cord Diseases

Your spinal cord is a bundle of nerves that runs down the middle of your back. It carries signals back and forth between your body and your brain. It is protected by your vertebrae, which are the bone disks that make up your spine. If you have an accident that damages the vertebrae or other parts of the spine, this can also injure the spinal cord. Other spinal cord problems include:

  • Tumors
  • Infections such as meningitis and polio
  • Inflammatory diseases
  • Autoimmune diseases
  • Degenerative diseases such as amyotrophic lateral sclerosis and spinal muscular atrophy

Symptoms vary but might include pain, numbness, loss of sensation and muscle weakness. These symptoms can occur around the spinal cord, and also in other areas such as your arms and legs. Treatments often include medicines and surgery.

[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.