2026 ICD-10-CM Diagnosis Code G96.191Perineural cyst

ICD-10-CM Codes›G00–G99›G89-G99›G96

ICD-10-CM G96.191
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G96.191 is a billable ICD-10-CM diagnosis code for perineural cyst. 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
G96.191
Billable Status
Yes — Valid for Submission
Code Describes
Perineural cyst
Short Description
Perineural cyst
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 CodeG96.191Perineural cyst

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Perineural cyst

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Cervical nerve root cyst
  • Lumbar nerve root cyst
  • Sacral nerve root cyst
  • Tarlov cyst
  • Thoracic nerve root cyst

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.

    • Cyst(colloid) (mucous) (simple) (retention)
      • nerve root
        • cervical
    • Cyst(colloid) (mucous) (simple) (retention)
      • nerve root
        • lumbar
    • Cyst(colloid) (mucous) (simple) (retention)
      • nerve root
        • sacral
    • Cyst(colloid) (mucous) (simple) (retention)
      • nerve root
        • thoracic
    • Cyst(colloid) (mucous) (simple) (retention)
      • perineural
    • Cyst(colloid) (mucous) (simple) (retention)
      • Tarlov

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

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.

Read the full article at MedlinePlus

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

Code History & ChangesHistory

Replacement G96.191 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 G96.191Overview

Is G96.191 (Other disorders of meninges, not elsewhere classified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report perineural cyst 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.