ICD-10-CM 2027 diagnosis code

G93Other disorders of brain

Not billable — use a more specific code

G93 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G93

G93 is the ICD-10-CM diagnosis code for other disorders of brain. It belongs to block G89-G99 (other disorders of the 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 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: G93.0 (cysts), G93.1 (classified), G93.2 (hypertension), G93.3 (syndromes), G93.4 (encephalopathy), G93.5 (brain), G93.6 (edema), G93.7 (syndrome) and 2 more.

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

Specific codes under G93

Notes that apply from higher levels

Instructions written at a parent level also apply to G93.

Broader instructions also apply from Chapter 6: Diseases of the nervous system.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about G93

Is G93 billable?: No. G93 is a header code. Report one of its more specific subcodes instead.