ICD-10 Code G56.0 – Carpal tunnel syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.0 – Carpal tunnel syndrome
What it is
G56.0 identifies compression of the median nerve at the wrist, known as carpal tunnel syndrome. Use it when documentation confirms this specific entrapment neuropathy.
Clinical signs
Typical findings include numbness, tingling, or pain in the thumb, index, middle, and radial half of the ring finger. Symptoms may worsen at night or with repetitive hand use; clinical features vary, so refer to documentation.
When to use this code
Use G56.0 when the provider documents carpal tunnel syndrome, median nerve compression at the wrist, or an equivalent diagnosis. It also fits confirmed bilateral or unilateral cases when no more specific laterality code is available in the record. If the note only says hand pain or numbness without a diagnosis, check documentation.
Do not use for
Do not use this code for generalized neuropathy, cervical radiculopathy, or other nerve entrapments outside the carpal tunnel. If the diagnosis is uncertain or only suspected, check documentation.
Coding tip
Assign G56.0 only when the provider clearly links symptoms to median nerve compression at the wrist.