ICD-10 Code G57.51 – Tarsal tunnel syndrome, right lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.51 – Tarsal tunnel syndrome, right lower limb
What it is
G57.51 identifies tarsal tunnel syndrome affecting the right lower limb. It means the posterior tibial nerve is compressed at the ankle, causing a nerve entrapment problem on the right side.
Clinical signs
Typical findings include burning, tingling, numbness, or pain along the inside of the ankle and foot. Symptoms may worsen with standing or walking; clinical features vary, and you should refer to documentation.
When to use this code
Use this code when the provider documents tarsal tunnel syndrome in the right lower limb or right ankle region. It is appropriate when the record clearly identifies right-sided nerve entrapment rather than a nonspecific foot pain diagnosis. If laterality is not stated, check documentation before assigning this code.
Do not use for
Do not use G57.51 for left-sided or unspecified tarsal tunnel syndrome. Avoid it when the note describes general foot pain, plantar fasciitis, or another cause of neuropathy without confirming tarsal tunnel syndrome.
Coding tip
Confirm right laterality in the provider note before coding; if the side is missing, you need documentation support.