2026 ICD-10-CM Diagnosis Code G96.9Disorder of central nervous system, unspecified

ICD-10-CM Codes›G00–G99›G89-G99›G96

ICD-10-CM G96.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G96.9 is a billable ICD-10-CM diagnosis code for disorder of central nervous system, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (neither hereditary nor degenerative).

Code Identity

ICD-10-CM Code
G96.9
Billable Status
Yes — Valid for Submission
Code Describes
Disorder of central nervous system, unspecified
Short Description
Disorder of central nervous system, unspecified
Same as the full description in the CMS dataset.
Parent Code
G96
Other disorders of central nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG96Other disorders of central nervous system
This CodeG96.9Disorder of central nervous system, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute lymphoid leukemia in remission
  • Central nervous disorder with AIDS
  • Central nervous system complication
  • Central nervous system disorder due to Sjögren's syndrome
  • Central nervous system dysfunction in newborn
  • Chronic headache due to disorder
  • Chronic headache due to non-vascular intracranial disorder
  • Chronic orofacial pain
  • Chronic orofacial pain due to disorder
  • Chronic orofacial pain due to nonvascular intracranial disorder
  • Chronic pain in face
  • Dementia due to disorder of central nervous system
  • Disorder of central nervous system co-occurrent and due to acute lymphoid leukemia
  • Disorder of central nervous system co-occurrent and due to acute lymphoid leukemia in remission
  • Disorder of central nervous system co-occurrent with human immunodeficiency virus infection
  • Disorder of central nervous system due to and following procedure
  • Disorder of central nervous system due to xeroderma pigmentosum
  • Disorder of meninges
  • Disorder of neurometabolic regulation
  • Disorder of the central nervous system
  • Encephalomyelopathy
  • Functional disease of the CNS with neuroendocrine disturbance
  • Headache due to intracranial disease
  • Localized intracranial lesion
  • Lymphoid leukemia in remission
  • Neuropathic spondylopathy
  • Tremor due to central nervous system disease

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Complication(s) (from) (of)
      • nervous system
        • central
    • Depression(acute) (mental)
      • central nervous system
    • Disease, diseased
      • cerebrospinal
    • Disease, diseased
      • nervous system
        • central
    • Disorder(of)
      • nervous system
        • central
    • Encephalomyelopathy
    • Encephalomyeloradiculopathy
    • Meningoencephalomyelopathy
    • Meningoencephalopathy

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS020
Other nervous system disorders (neither hereditary nor degenerative)
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G96.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
349.9 Cns disorder NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G96.9Overview

Is G96.9 (Other disorders of central nervous system) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorder of central nervous system, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does G96.9 group to?

When disorder of central nervous system, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 974, 975, 976, with relative weights from 0.8945 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of G96.9?

Under the General Equivalence Mappings, disorder of central nervous system, unspecified converts to ICD-9-CM 349.9 (cns disorder NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.