ICD-10 Code G57.83 – Other specified mononeuropathies of bilateral lower limbs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.83 – Other specified mononeuropathies of bilateral lower limbs
What it is
This code identifies a mononeuropathy affecting nerves in both lower limbs when the condition is specified but does not fit another listed category. Use it for localized nerve disorders, not generalized polyneuropathy.
Clinical signs
Findings may include numbness, tingling, pain, weakness, or sensory loss in nerve distributions of both legs. Clinical features vary; refer to documentation for the named nerve or exact bilateral involvement.
When to use this code
Use G57.83 when the provider documents a specific mononeuropathy in both lower extremities and no more specific ICD-10-CM code applies. It is appropriate when the record supports bilateral lower-limb nerve involvement but not a broader neuropathic disorder. Check documentation if the exact nerve is not named.
Do not use for
Do not use this code for unspecified neuropathy, polyneuropathy, or mononeuropathy limited to one limb. If the documentation names a more specific bilateral lower-limb nerve disorder, code that condition instead.
Coding tip
Confirm that the provider documents both lower limbs and a specified mononeuropathy before assigning G57.83.