2026 ICD-10-CM Diagnosis Code G96.198Other disorders of meninges, not elsewhere classified

ICD-10-CM Codes›G00–G99›G89-G99›G96

ICD-10-CM G96.198
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G96.198 is a billable ICD-10-CM diagnosis code for other disorders of meninges, not elsewhere classified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). 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
G96.198
Billable Status
Yes — Valid for Submission
Code Describes
Other disorders of meninges, not elsewhere classified
Short Description
Other disorders of meninges, not elsewhere classified
Same as the full description in the CMS dataset.
Parent Code
G96.19
Other disorders of meninges, not elsewhere classified

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG96Other disorders of central nervous system
This CodeG96.198Other disorders of meninges, not elsewhere classified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired meningocele
  • Acquired pseudomeningocele
  • Angiomatosis of meninges
  • Cerebrospinal fluid otorrhea
  • Cerebrospinal fluid otorrhea due to giant arachnoid granulation
  • Cyst of spinal meninges
  • Cyst of spinal subdural space caused by parasite
  • Dural ossification
  • Ependymal cyst
  • Ependymal cyst of spinal cord
  • Ependymal cyst of spinal meninges
  • Giant arachnoid granulation
  • Infection causing cyst of central nervous system
  • Infection causing spinal epidural cyst
  • Infection causing spinal subdural cyst
  • Meningeal melanosis
  • Meningocele of vertex
  • Neurocutaneous melanosis
  • Ossifying pachymeningitis
  • Postoperative meningocele
  • Postoperative pseudomeningocele
  • Pseudomeningocele
  • Traumatic meningocele

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.

    • Calcification
      • falx cerebri
    • Calcification
      • meninges (cerebral) (spinal)
    • Cyst(colloid) (mucous) (simple) (retention)
      • dura (cerebral)
        • spinal
    • Cyst(colloid) (mucous) (simple) (retention)
      • meninges (cerebral)
        • spinal
    • Cyst(colloid) (mucous) (simple) (retention)
      • spinal meninges
    • Cyst(colloid) (mucous) (simple) (retention)
      • subdural (cerebral)
        • spinal cord
    • Deformity
      • choroid (congenital)
        • plexus
          • acquired
    • Deformity
      • meninges or membrane (congenital)
        • cerebral
          • acquired
    • Deformity
      • meninges or membrane (congenital)
        • spinal cord (congenital)
          • acquired
    • Disorder(of)
      • meninges, specified type NEC
    • Fibrosis, fibrotic
      • meninges
    • Leptomeningopathy
    • Meningitis(basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)
      • ossificans
    • Meningocele(spinal)
      • acquired (traumatic)
    • Ossification
      • falx cerebri
    • Ossification
      • meninges (cerebral) (spinal)
    • Pseudomeningocele(cerebral) (infective) (post-traumatic)

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

Clinical InformationClinical

  • Cerebrospinal Fluid Otorrhea

    discharge of cerebrospinal fluid through the external auditory meatus or through the eustachian tube into the nasopharynx. this is usually associated with craniocerebral trauma (e.g., skull fracture involving the temporal bone;), neurosurgical procedures; or other conditions, but may rarely occur spontaneously. (from am j otol 1995 nov;16(6):765-71)

  • Ependymal Cyst

    a fluid filled sac lined by ependymal cells.

  • Subependymal Pseudocyst|Germinolytic Cyst|Subependymal Cyst

    cerebral periventricular cyst located on the floor of the lateral cerebral ventricle, most commonly in the caudothalamic groove, and results from regression of the germinal matrix or as a sequela of a prior subependymal hemorrhage or germinal matrix infarct.

  • Cerebrospinal Fluid Otorrhea

    discharge of cerebrospinal fluid through the ear structures.

Code History & ChangesHistory

Replacement G96.198 replaces the following previously assigned code(s):

  • G96.19 - Other disorders of meninges, not elsewhere classified
FY 2021AddedAdded to the ICD-10-CM code setEffective October 1, 2020.
FY 2022–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G96.198Overview

Is G96.198 (Other disorders of meninges, not elsewhere classified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other disorders of meninges, not elsewhere classified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

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.