ICD-10-CM 2027 diagnosis code

G70Myasthenia gravis and other myoneural disorders

Not billable — use a more specific code

G70 is a header code, so it can't be reported by itself. Choose one of the 5 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 G70

G70 is the ICD-10-CM diagnosis code for myasthenia gravis and other myoneural disorders. It belongs to block G70-G73 (diseases of myoneural junction and muscle) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: G70.0 (gravis), G70.1 (disorders), G70.2 (myasthenia), G70.8 (disorders) and G70.9 (unspecified).

Don't report G70 together with the conditions in its Excludes1 note: botulism (A05.1, A48.51-A48.52) and transient neonatal myasthenia gravis (P94.0).

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 G70

Coding notes

Excludes1Not coded here — never report together with this code

botulism (A05.1, A48.51-A48.52)
transient neonatal myasthenia gravis (P94.0)

Notes that apply from higher levels

Instructions written at a parent level also apply to G70.

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 G70

Is G70 billable?: No. G70 is a header code. Report one of its more specific subcodes instead.