ICD-10 Code G57.73 – Causalgia of bilateral lower limbs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G57.73 – Causalgia of bilateral lower limbs
What it is
Causalgia of bilateral lower limbs refers to severe, persistent burning pain affecting both legs, usually after injury or nerve damage. The code identifies a neuropathic pain condition involving the lower extremities on both sides.
Clinical signs
Typical findings include burning pain, marked tenderness, and pain out of proportion to the original injury. Clinical features vary; refer to documentation for sensory changes, swelling, temperature change, or skin color changes.
When to use this code
Use this code when the provider documents causalgia specifically involving both lower limbs. It is appropriate when the pain syndrome is localized to the legs and the record supports bilateral involvement. Check documentation if the note only says neuropathic pain or CRPS without specifying causalgia.
Do not use for
Do not use this code for generalized leg pain, unilateral causalgia, or pain not documented as causalgia. If the record describes another neuropathic disorder instead, code that condition rather than assuming G57.73.
Coding tip
Confirm both laterality and the exact term “causalgia” in the assessment before assigning G57.73.