ICD-10 Code G56.00 – Carpal Tunnel Syndrome, Unspecified Upper Limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G56.00 – Carpal tunnel syndrome, unspecified upper limb
What it is
G56.00 identifies carpal tunnel syndrome affecting an upper limb, but the chart does not specify right or left. It reflects median nerve compression at the wrist.
Clinical signs
Typical findings include numbness, tingling, or pain in the thumb, index, middle, and part of the ring finger. Symptoms may worsen at night or with repetitive hand use; clinical features vary, refer to documentation.
When to use this code
Use this code when the provider documents carpal tunnel syndrome and does not identify the affected side. It also fits when laterality is unclear in the note or report. If the record states right, left, or bilateral disease, code more specifically.
Do not use for
Do not use G56.00 for nonspecific hand pain, numbness without a carpal tunnel diagnosis, or other median nerve disorders. Check documentation if the condition is documented as bilateral or with a specified side.
Coding tip
Verify laterality in the assessment and impression before assigning this unspecified code.