G56.4
⚠ Non-billable
Causalgia of upper limb
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G56.4
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Nervous System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code G56.4?
ICD-10-CM code G56.4 represents Causalgia of upper limb. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G56.4 billable?
No. G56.4 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is G56.4 in?
G56.4 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G56 category
G56
Mononeuropathies of upper limb
Non-billable
G56.0
Carpal tunnel syndrome
Non-billable
G56.1
Other lesions of median nerve
Non-billable
G56.2
Lesion of ulnar nerve
Non-billable
G56.3
Lesion of radial nerve
Non-billable
G56.8
Other specified mononeuropathies of upper limb
Non-billable
G56.9
Unspecified mononeuropathy of upper limb
Non-billable
G56.00
Carpal tunnel syndrome, unspecified upper limb
Billable
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