ICD-10 Code G56.81 – Other specified mononeuropathies of right upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.81 – Other specified mononeuropathies of right upper limb
What it is
This code identifies a mononeuropathy affecting a specific nerve in the right upper limb when the condition is not described by a more exact code. Use it for localized nerve dysfunction in the arm or hand.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include numbness, tingling, pain, weakness, or reduced sensation in the distribution of a single right upper-extremity nerve.
When to use this code
Use this code when the provider documents a right upper-limb mononeuropathy but does not name a more specific neuropathy such as median, ulnar, or radial nerve involvement. It also fits when the record says “other specified” nerve disorder of the right arm and laterality is clearly documented.
Do not use for
Do not use this code for bilateral disease, unspecified upper-limb neuropathy, or generalized peripheral neuropathy. If the nerve involved or the side is unclear, check documentation.
Coding tip
Confirm both the affected nerve and right-sided laterality before assigning G56.81.