G13Header code — not billable

Systemic atrophies primarily affecting central nervous system in diseases classified elsewhere

Short description: Systemic atrophies aff cnsl in diseases classd elswhr

Chapter
6. Diseases of the nervous system
Category
G13
Effective date
October 1, 2026

Related codes in category G13

G13.0Paraneoplastic neuromyopathy and neuropathyYesG13.1Oth systemic atrophy aff cnsl in neoplastic diseaseYesG13.2Systemic atrophy primarily affecting the cnsl in myxedemaYesG13.8Systemic atrophy aff cnsl in oth diseases classd elswhrYes

Frequently asked questions

What is ICD-10 code G13?

G13 is an ICD-10-CM diagnosis code for Systemic atrophies primarily affecting central nervous system in diseases classified elsewhere.

Is G13 a billable code?

No. G13 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is G13 in?

G13 falls under Chapter 6: Diseases of the nervous system.

When did G13 become effective?

G13 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to G13?

G13 belongs to category G13, which includes 4 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.