ICD-10-CM Code G93.9

Disorder of brain, unspecified

Version 2021 Billable Code

Valid for Submission

G93.9 is a billable code used to specify a medical diagnosis of disorder of brain, unspecified. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code G93.9 might also be used to specify conditions or terms like aphasia due to brain damage, cerebellar disorder, childhood myocerebrohepatopathy spectrum, disorder of brain, disorder of brain stem, disorder of cerebral cortex, etc

Short Description:Disorder of brain, unspecified
Long Description:Disorder of brain, unspecified

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code G93.9 are found in the index:


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

  • Aphasia due to brain damage
  • Cerebellar disorder
  • Childhood myocerebrohepatopathy spectrum
  • Disorder of brain
  • Disorder of brain stem
  • Disorder of cerebral cortex
  • Disorder of midbrain
  • Disruptive behavior
  • Disruptive vocalization
  • Language disorder associated with right hemisphere damage
  • Lesion of brain
  • Lesion of brainstem
  • Lesion of posterior fossa of cranial cavity
  • Memory disorder co-occurrent and due to organic brain damage
  • Organic memory impairment
  • Specific nonpsychotic mental disorders following organic brain damage
  • Vocalization

Convert G93.9 to ICD-9

  • 348.9 - Brain condition NOS (Approximate Flag)

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Other disorders of the nervous system (G89-G99)
      • Other disorders of brain (G93)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients

Brain Diseases

The brain is the control center of the body. It controls thoughts, memory, speech, and movement. It regulates the function of many organs. When the brain is healthy, it works quickly and automatically. However, when problems occur, the results can be devastating.

Inflammation in the brain can lead to problems such as vision loss, weakness and paralysis. Loss of brain cells, which happens if you suffer a stroke, can affect your ability to think clearly. Brain tumors can also press on nerves and affect brain function. Some brain diseases are genetic. And we do not know what causes some brain diseases, such as Alzheimer's disease.

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 physical therapy can correct the source of the problem or improve symptoms.

  • Basal ganglia dysfunction (Medical Encyclopedia)
  • Brain abscess (Medical Encyclopedia)
  • Brain surgery (Medical Encyclopedia)
  • Central pontine myelinolysis (Medical Encyclopedia)
  • Cerebral spinal fluid (CSF) collection (Medical Encyclopedia)
  • EEG (Medical Encyclopedia)
  • Hepatic encephalopathy (Medical Encyclopedia)
  • Pseudotumor cerebri (Medical Encyclopedia)
  • Wernicke-Korsakoff syndrome (Medical Encyclopedia)

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