G57.9
⚠ Non-billable
Unspecified mononeuropathy of lower limb
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G57.9
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 G57.9?
ICD-10-CM code G57.9 represents Unspecified mononeuropathy of lower 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 G57.9 billable?
No. G57.9 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is G57.9 in?
G57.9 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G57 category
G57
Mononeuropathies of lower limb
Non-billable
G57.0
Lesion of sciatic nerve
Non-billable
G57.1
Meralgia paresthetica
Non-billable
G57.2
Lesion of femoral nerve
Non-billable
G57.3
Lesion of lateral popliteal nerve
Non-billable
G57.4
Lesion of medial popliteal nerve
Non-billable
G57.5
Tarsal tunnel syndrome
Non-billable
G57.6
Lesion of plantar nerve
Non-billable
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