2027 ICD-10-CM Diagnosis Code G70Myasthenia gravis and other myoneural disorders

ICD-10-CM Codes›G00–G99›G70-G73›G70

ICD-10-CM G70
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G70 is a non-billable ICD-10-CM category code for myasthenia gravis and other myoneural disorders, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G70.00, G70.01, G70.1, and G70.2.

Code Identity

ICD-10-CM Code
G70
Billable Status
No — Non-Billable Category
Code Describes
Myasthenia gravis and other myoneural disorders
Short Description
Myasthenia gravis and other myoneural disorders
Same as the full description in the CMS dataset.
Chapter
G70-G73
Diseases of myoneural junction and muscle

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG70-G73Diseases of myoneural junction and muscle
CategoryG70Myasthenia gravis and other myoneural disorders
This CodeG70Myasthenia gravis and other myoneural disorders

Specific Coding for Myasthenia gravis and other myoneural disordersOverview

Non-specific codes like G70 require more characters. Use one of these billable codes instead:

  • G70.0 for Myasthenia gravis

  • Use G70.00 for Myasthenia gravis without (acute) exacerbation

  • Use G70.01 for Myasthenia gravis with (acute) exacerbation

  • Use G70.1 for Toxic myoneural disorders

  • Use G70.2 for Congenital and developmental myasthenia

  • G70.8 for Other specified myoneural disorders

  • Use G70.80 for Lambert-Eaton syndrome, unspecified

  • Use G70.81 for Lambert-Eaton syndrome in disease classified elsewhere

  • Use G70.89 for Other specified myoneural disorders

  • Use G70.9 for Myoneural disorder, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G70: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Patient EducationClinical

Myasthenia Gravis

Myasthenia gravis, sometimes called MG, is a chronic (long-lasting) disease that causes weakness in your voluntary muscles. The voluntary muscles are the ones that you can control. They include the muscles you use for:

The full article covers:

  • What is myasthenia gravis?
  • What causes myasthenia gravis?
  • Who is more likely to develop myasthenia gravis?
  • What are the symptoms of myasthenia gravis?
  • How is myasthenia gravis diagnosed?
  • What are the treatments for myasthenia gravis?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G70Overview

What is the ICD-10 code for myasthenia gravis and other myoneural disorders?

G70 is the ICD-10-CM category for myasthenia gravis and other myoneural disorders, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is G70 (Myasthenia gravis and other myoneural disorders) a billable code?

No. This is a category header that groups the codes for myasthenia gravis and other myoneural disorders, and headers cannot be submitted on claims. Claims for myasthenia gravis and other myoneural disorders need a more specific code from this category, such as G70.00, G70.01, and G70.1.

Can G70 be reported with A05.1?

Not as a rule. The Excludes1 note on G70 lists "botulism (A05.1, A48.51-A48.52)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).