G96.191 ICD-10-CM Code: Perineural cyst
G96.191 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Other disorders of the nervous system (G89-G99)
G96.191
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePerineural cyst
A fluid-filled sac or cyst that forms around a nerve root, typically in the spinal canal, which may cause pain or neurological symptoms.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Cervical nerve root cyst
- Lumbar nerve root cyst
- Sacral nerve root cyst
- Tarlov cyst
- Thoracic nerve root cyst
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for G96.191 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for G96.191 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for G96.191 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for G96.191 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for G96.191 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for G96.191 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is G96.191 an HCC code?
No. G96.191 is a billable ICD-10-CM code with no mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- G96.191
- Description
- Perineural cyst
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
G96.191 is the ICD-10-CM diagnosis code for perineural cyst. A fluid-filled sac or cyst that forms around a nerve root, typically in the spinal canal, which may cause pain or neurological symptoms. G96.191 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering other disorders of the nervous system (g89-g99).
G96.191 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
Confirm the diagnosis with imaging (MRI or CT) documentation in the medical record.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for G96.191 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm the diagnosis with imaging (MRI or CT) documentation in the medical record
- •Note the location of the perineural cyst (cervical, thoracic, lumbar, sacral) for clinical reference