ICD-10 Code G64 – Other disorders of peripheral nervous system (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G64 – Other disorders of peripheral nervous system
What it is
G64 is a nonspecific code for peripheral nervous system disorders that do not fit a more defined diagnosis. It covers conditions affecting peripheral nerves, nerve roots, or related structures when documentation is limited or atypical.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records mention numbness, tingling, weakness, pain, or abnormal reflexes consistent with peripheral nerve involvement.
When to use this code
Use G64 when the provider documents a peripheral nervous system disorder but does not identify a more specific condition. It may also apply when the chart describes mixed or unspecified peripheral neuropathic findings without a clearer diagnosis. Check documentation before defaulting to this code.
Do not use for
Do not use G64 when a more specific neuropathy, radiculopathy, mononeuropathy, or hereditary disorder is documented. Also avoid it if the condition is better classified elsewhere in the chart.
Coding tip
Code the most specific peripheral nerve diagnosis available; use G64 only when the record supports a nonspecific peripheral nervous system disorder.