G97.64 ICD-10-CM Code: Postprocedural seroma of a nervous system organ or structure following other procedure
HCC Buddy Code Card
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FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Other disorders of the nervous system (G89-G99)
G97.64
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePostprocedural seroma of a nervous system organ or structure following other procedure
A collection of clear fluid that forms around the brain, spinal cord, or nerves after a non-neurological surgical procedure.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for G97.64 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for G97.64 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for G97.64 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for G97.64 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for G97.64 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for G97.64 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for G97.64 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 G97.64 an HCC code?
No. G97.64 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- G97.64
- Description
- Postprocedural seroma of a nervous system organ or structure following other procedure
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- 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
G97.64 is the ICD-10-CM diagnosis code for postprocedural seroma of a nervous system organ or structure following other procedure. A collection of clear fluid that forms around the brain, spinal cord, or nerves after a non-neurological surgical procedure. G97.64 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).
G97.64 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Distinguish seromas from hematomas by confirming the fluid is serous (clear) rather than hemorrhagic.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G97.64 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Distinguish seromas from hematomas by confirming the fluid is serous (clear) rather than hemorrhagic
- •Document whether the seroma is symptomatic or asymptomatic, as this may affect clinical management decisions