G57.7Non-Billable (Header)Causalgia of lower limbExcludes 1 — Do NOT code togethercomplex regional pain syndrome I of lower limb (G90.52-)complex regional pain syndrome I of upper limb (G90.51-)complex regional pain syndrome II of upper limb (G56.4-)reflex sympathetic dystrophy of lower limb (G90.52-)reflex sympathetic dystrophy of upper limb (G90.51-)Child CodesG57.70Causalgia of unspecified lower limbG57.71Causalgia of right lower limbG57.72Causalgia of left lower limbG57.73Causalgia of bilateral lower limbsCode Hierarchy└G57Mononeuropathies of lower limb└G57.7Causalgia of lower limb└G57.7Causalgia of lower limb