ICD-10 Code G57.72 – Causalgia of left lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.72 – Causalgia of left lower limb
What it is
Causalgia of the left lower limb is a painful nerve disorder affecting the left leg. It refers to severe, burning neuropathic pain after nerve injury or irritation, with symptoms localized to the left lower extremity.
Clinical signs
Typical findings include burning pain, allodynia, and hypersensitivity in the affected limb. Clinical features vary; refer to documentation for evidence of nerve injury, sensory changes, or autonomic features.
When to use this code
Use G57.72 when the record specifically documents causalgia in the left lower limb. Code it when the provider identifies left-sided neuropathic pain consistent with this diagnosis and the documentation supports laterality. If the note only says leg pain or neuropathy, check documentation before assigning this code.
Do not use for
Do not use this code for generalized lower-limb pain, unspecified neuropathy, or pain without documented causalgia. Do not assume the diagnosis from symptoms alone; check documentation.
Coding tip
Verify that the provider documents both causalgia and left lower-limb laterality before coding G57.72.