Tarsal tunnel syndrome, right lower limb

This code signifies a compressive neuropathy affecting the posterior tibial nerve or its branches as they pass through the tarsal tunnel in the right ankle. Patients typically experience pain, numbness, or tingling in the sole of the foot, toes, or heel, often exacerbated by activity.

Apply this code when documentation clearly indicates a diagnosis of tarsal tunnel syndrome affecting the patient's right lower limb. Supporting documentation should include physical exam findings (e.g., positive Tinel's sign over the tarsal tunnel), nerve conduction studies, or electromyography confirming nerve compression.

• Ensure laterality is explicitly documented as "right" to support this specific code.
• Distinguish from other neuropathies of the foot, such as plantar fasciitis or Morton's neuroma, which have different ICD-10-CM codes.
• Look for documentation of the specific nerve involved (posterior tibial nerve) to confirm the diagnosis.