G57.7Causalgia of lower limb

G57.7 is the ICD-10-CM diagnosis code for Causalgia of lower limb. It belongs to category G57 (mononeuropathies of lower limb), block G50-G59 (nerve, nerve root and plexus disorders) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within G57 (mononeuropathies of lower limb), G57.7 is specifically for Causalgia of lower limb. Related codes cover lesion of sciatic nerve (G57.0), Meralgia paresthetica (G57.1), lesion of femoral nerve (G57.2), lesion of lateral popliteal nerve (G57.3), lesion of medial popliteal nerve (G57.4), tarsal tunnel syndrome (G57.5), lesion of plantar nerve (G57.6), other specified mononeuropathies of lower limb (G57.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: G57.70 (limb), G57.71 (limb), G57.72 (limb) and G57.73 (limbs).

Don't report G57.7 together with the conditions in its Excludes1 note: complex 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-) and 1 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.