2026 ICD-10-CM Diagnosis Code G70.9Myoneural disorder, unspecified

ICD-10-CM Codes›G00–G99›G70-G73›G70

ICD-10-CM G70.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G70.9 is a billable ICD-10-CM diagnosis code for myoneural disorder, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Myopathies.

Code Identity

ICD-10-CM Code
G70.9
Billable Status
Yes — Valid for Submission
Code Describes
Myoneural disorder, unspecified
Short Description
Myoneural disorder, unspecified
Same as the full description in the CMS dataset.
Parent Code
G70
Myasthenia gravis and other myoneural disorders

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG70-G73Diseases of myoneural junction and muscle
CategoryG70Myasthenia gravis and other myoneural disorders
This CodeG70.9Myoneural disorder, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cardiomyopathy due to neuromuscular disorder
  • Chronic respiratory failure
  • Chronic respiratory failure due to neuromuscular disease
  • Denervation
  • Dilated cardiomyopathy due to neuromuscular disorder
  • Disorder of neuromuscular transmission
  • Hypertrophic cardiomyopathy due to neuromuscular disorder
  • Hypoventilation during sleep due to neuromuscular disorder
  • Myasthenic facies
  • Myoneural disorder
  • Neonatal hypotonia
  • Neonatal neuromuscular disorder
  • Neuromyopathy
  • Restrictive lung disease
  • Restrictive lung mechanics due to neuromuscular disease
  • Sleep hypoventilation
  • Sleep related hypoventilation or hypoxemia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disease, diseased
      • myoneural
    • Disease, diseased
      • neuromuscular system
    • Disorder(of)
      • myoneural
    • Disorder(of)
      • neuromuscular
    • Myasthenia
    • Neuromyopathy
    • Syndrome
      • myasthenic

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS018
Myopathies
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Autonomic Denervation

    the removal or interruption of some part of the autonomic nervous system for therapeutic or research purposes.

  • Denervation

    the resection or removal of the nerve to an organ or part.

  • Muscle Denervation

    the resection or removal of the innervation of a muscle or muscle tissue.

  • Parasympathectomy

    the removal or interruption of some part of the parasympathetic nervous system for therapeutic or research purposes.

  • Sympathectomy

    the removal or interruption of some part of the sympathetic nervous system for therapeutic or research purposes.

  • Sympathectomy, Chemical

    sympathectomy using chemicals (e.g., 6-hydroxydopamine or guanethidine) which selectively and reversibly destroy adrenergic nerve endings while leaving cholinergic nerve endings intact.

  • Restrictive Lung Disease

    decreased lung volume and inadequate ventilation due to parenchymal lung disorders (e.g., interstitial pulmonary fibrosis) or extrapulmonary disorders (e.g., scoliosis). patients present with shortness of breath and cough.

Patient EducationClinical

Neuromuscular Disorders

Neuromuscular disorders affect your neuromuscular system. They can cause problems with:

Read the full article at MedlinePlus

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

Convert G70.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
358.9 Myoneural disorders NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G70.9Overview

Is G70.9 (Myasthenia gravis and other myoneural disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report myoneural disorder, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of G70.9?

Under the General Equivalence Mappings, myoneural disorder, unspecified converts to ICD-9-CM 358.9 (myoneural disorders NOS). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.