G56.3Lesion of radial nerve

G56.3 is the ICD-10-CM diagnosis code for lesion of radial nerve. It belongs to category G56 (mononeuropathies of upper 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 G56 (mononeuropathies of upper limb), G56.3 is specifically for lesion of radial nerve. Related codes cover carpal tunnel syndrome (G56.0), other lesions of median nerve (G56.1), lesion of ulnar nerve (G56.2), Causalgia of upper limb (G56.4), other specified mononeuropathies of upper limb (G56.8) and unspecified mononeuropathy of upper limb (G56.9).

To report this condition, pick the subcode that matches the documentation: G56.30 (unspecified upper limb), G56.31 (right upper limb), G56.32 (left upper limb) and G56.33 (bilateral upper limbs).

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