G56.33 ICD-10-CM Code: Lesion of radial nerve, bilateral upper limbs
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FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Nerve, nerve root and plexus disorders (G50-G59)
G56.33
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceLesion of radial nerve, bilateral upper limbs
Damage or injury to the radial nerve affecting both arms, causing weakness in wrist extension and numbness in both hands.
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 G56.33 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for G56.33 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for G56.33 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for G56.33 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for G56.33 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for G56.33 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for G56.33 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 G56.33 an HCC code?
No. G56.33 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- G56.33
- Description
- Lesion of radial nerve, bilateral upper limbs
- 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
G56.33 is the ICD-10-CM diagnosis code for lesion of radial nerve, bilateral upper limbs. Damage or injury to the radial nerve affecting both arms, causing weakness in wrist extension and numbness in both hands. G56.33 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering nerve, nerve root and plexus disorders (g50-g59).
G56.33 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.
Bilateral coding requires clear documentation that both upper limbs are involved.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G56.33 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Bilateral coding requires clear documentation that both upper limbs are involved
- •Consider underlying systemic causes or whether injuries occurred separately