2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G96.191 is a billable ICD-10-CM diagnosis code for perineural cyst. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93. 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G96.191: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

  • Tarlov Cysts

    perineurial cysts commonly found in the sacral region. they arise from the perineurium membrane within the spinal nerve roots. the distinctive feature of the cysts is the presence of spinal nerve root fibers within the cyst wall, or the cyst cavity itself.

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 2022–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G96.191Overview

What is the ICD-10 code for perineural cyst?

The ICD-10-CM code for perineural cyst is G96.191 (sometimes written as G96191). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does G96.191 group to?

When perineural cyst is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.