ICD-10 Code G58 – Other mononeuropathies (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G58 – Other mononeuropathies
What it is
G58 identifies mononeuropathies that affect a single peripheral nerve but do not fit a more specific ICD-10 code. Use it for nerve disorders documented as “other” or unspecified within this category.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include localized numbness, pain, tingling, weakness, or reduced function in the distribution of one affected nerve.
When to use this code
Use G58 when the record clearly shows a mononeuropathy, but the affected nerve is not named or does not have a more specific code. It is also appropriate when the provider documents an “other mononeuropathy” diagnosis. Check documentation if the note only describes generalized neuropathy or multiple nerve involvement.
Do not use for
Do not use this code for polyneuropathy, radiculopathy, or nerve root disorders. If the documentation identifies a specific nerve lesion with its own code, choose that code instead.
Coding tip
Code the most specific mononeuropathy documented, and default to G58 only when the record supports “other” or lacks further nerve detail.