ICD-10 Code G56.93 – Unspecified mononeuropathy of bilateral upper limbs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.93 – Unspecified mononeuropathy of bilateral upper limbs
What it is
This code identifies a single-nerve disorder affecting both upper limbs, but the exact nerve is not specified. Use it when documentation confirms mononeuropathy in both arms or hands without naming a more precise site.
Clinical signs
Clinical features vary; refer to documentation. Common findings in mononeuropathy include numbness, tingling, pain, weakness, or sensory loss in a nerve distribution.
When to use this code
Use G56.93 when the provider documents bilateral upper-limb mononeuropathy and does not identify the affected nerve. It also fits cases where the record supports a focal peripheral nerve disorder in both upper extremities, but details are incomplete.
If laterality is documented only as bilateral and no more specific code is available, this code may be appropriate. Check documentation to confirm the condition is mononeuropathy rather than radiculopathy, polyneuropathy, or another neurologic disorder.
Do not use for
Do not use this code for cervical radiculopathy, generalized peripheral neuropathy, or mononeuropathy limited to one upper limb. Check documentation if the nerve involved is named more specifically.
Coding tip
Look for a documented bilateral focal nerve disorder and avoid this code when a more specific mononeuropathy code is supported.