G13Systemic atrophies primarily affecting central nervous system in diseases classified elsewhere

G13 is the ICD-10-CM diagnosis code for systemic atrophies primarily affecting central nervous system in diseases classified elsewhere. It belongs to block G10-G14 (systemic atrophies primarily affecting the central nervous system) 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.

To report this condition, pick the subcode that matches the documentation: G13.0 (neuropathy), G13.1 (disease), G13.2 (myxedema) and G13.8 (elsewhere).

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