ICD-10 Diagnosis Code G99

Oth disorders of nervous system in diseases classd elswhr

Diagnosis Code G99

ICD-10: G99
Short Description: Oth disorders of nervous system in diseases classd elswhr
Long Description: Other disorders of nervous system in diseases classified elsewhere
This is the 2017 version of the ICD-10-CM diagnosis code G99

Not Valid for Submission
The code G99 is a "header" and not valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the nervous system (G00–G99)
    • Other disorders of the nervous system (G89-G99)
      • Oth disorders of nervous system in diseases classd elswhr (G99)

Information for Patients


Neurologic Diseases

Also called: Nervous system diseases

The brain, spinal cord, and nerves make up the nervous system. Together they control all the workings of the body. When something goes wrong with a part of your nervous system, you can have trouble moving, speaking, swallowing, breathing, or learning. You can also have problems with your memory, senses, or mood.

There are more than 600 neurologic diseases. Major types include

  • Diseases caused by faulty genes, such as Huntington's disease and muscular dystrophy
  • Problems with the way the nervous system develops, such as spina bifida
  • Degenerative diseases, where nerve cells are damaged or die, such as Parkinson's disease and Alzheimer's disease
  • Diseases of the blood vessels that supply the brain, such as stroke
  • Injuries to the spinal cord and brain
  • Seizure disorders, such as epilepsy
  • Cancer, such as brain tumors
  • infections, such as meningitis

  • Cerebral spinal fluid (CSF) collection
  • EEG


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