ICD-10 Code G56.1 – Other lesions of median nerve (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.1 – Other lesions of median nerve
What it is
G56.1 identifies other disorders or injuries affecting the median nerve. Use it when documentation describes median nerve involvement but does not fit a more specific listed diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly, median nerve problems may include numbness, tingling, weakness, or reduced hand function in the nerve’s distribution.
When to use this code
Use this code when the provider documents a median nerve lesion, neuropathy, or other abnormality and no more specific code is available. It is appropriate for confirmed median nerve involvement after evaluation, imaging, or electrodiagnostic testing. Check documentation if the note is vague.
Do not use for
Do not use this code for carpal tunnel syndrome or other clearly specified median nerve entrapment conditions. Also avoid it when the record identifies a different nerve or a more precise diagnosis.
Coding tip
Code the most specific median nerve diagnosis documented; if the note says only “median nerve lesion,” this code is usually the best fit.