ICD-10 Code G56.82 – Other specified mononeuropathies of left upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.82 – Other specified mononeuropathies of left upper limb
What it is
G56.82 identifies a single-nerve disorder affecting the left upper limb that does not fit a more specific named mononeuropathy. Use it when documentation states an unspecified or other specified focal nerve problem on the left side.
Clinical signs
Typical findings include localized numbness, tingling, pain, or weakness in a distribution matching one upper-extremity nerve. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a mononeuropathy of the left arm or hand and names it as “other specified” rather than a classic entrapment syndrome. It may also apply when the affected nerve is identified, but no more specific ICD-10-CM option exists. Check documentation for laterality and nerve specificity.
Do not use for
Do not use G56.82 for bilateral disease, generalized polyneuropathy, or a clearly documented more specific mononeuropathy code. Do not substitute it when the record lacks left-sided laterality; check documentation.
Coding tip
Verify that the note supports both “left upper limb” and “other specified” before assigning G56.82.