Understanding Myasthenia Gravis In ICD-10: Coding And Documentation Guidelines

What is Myasthenia Gravis?

Myasthenia gravis is a chronic autoimmune neuromuscular disease that causes weakness in the skeletal muscles, which are the muscles that control voluntary movements. It is characterized by muscle fatigue and weakness, especially in the muscles that control eye movements, facial expressions, chewing, swallowing, and talking.

Code Information

ICD-10 code for myasthenia gravis is G70.0. This code is used to classify the disease in medical records and for billing purposes.

Diagnostic Related Groups (MS-DRG)

Myasthenia Gravis & ICD--CM – MRA
Myasthenia Gravis & ICD–CM – MRA

The MS-DRG for myasthenia gravis is 074 – Cranial and Peripheral Nerve Disorders without Major CC/MCC. This DRG is used for grouping patients with similar diagnoses for the purpose of payment under the Medicare system.

Convert to ICD-9 Code

The ICD-9 code equivalent for myasthenia gravis is 358.0. This code was used before the implementation of ICD-10 coding system.

Code History

ICD- Codes for Auto-Immune Disease Myasthenia Gravis
ICD- Codes for Auto-Immune Disease Myasthenia Gravis

Myasthenia gravis has been classified under various codes over the years, reflecting changes in medical coding systems and understanding of the disease.

Approximate Synonyms

Some approximate synonyms for myasthenia gravis include autoimmune myasthenia, generalized myasthenia gravis, and ocular myasthenia.

Clinical Information

ICD--CM Diagnosis Code G
ICD–CM Diagnosis Code G

Myasthenia gravis is caused by a breakdown in the communication between nerves and muscles, leading to muscle weakness and fatigue. It is believed to be an autoimmune disorder, where the body’s immune system mistakenly attacks the neuromuscular junction.


The exact cause of myasthenia gravis is unknown, but it is believed to be related to an abnormal immune response that targets the acetylcholine receptors on muscle cells. This leads to muscle weakness and fatigue.


ICD- Codes for Reporting Myasthenia Gravis (MG)
ICD- Codes for Reporting Myasthenia Gravis (MG)

Common symptoms of myasthenia gravis include drooping eyelids, double vision, difficulty swallowing, slurred speech, weakness in the arms and legs, and fatigue that worsens with activity.


Diagnosis of myasthenia gravis involves a thorough medical history, physical examination, and specialized tests such as the tensilon test, edrophonium test, electromyography, and blood tests for specific antibodies.


Treatment for myasthenia gravis typically involves medications to improve neuromuscular transmission, such as acetylcholinesterase inhibitors, immunosuppressants, and corticosteroids. In severe cases, thymectomy or intravenous immunoglobulin therapy may be recommended.


Myasthenia gravis is a complex autoimmune neuromuscular disorder that causes muscle weakness and fatigue. Proper diagnosis and treatment are essential to manage the symptoms and improve quality of life for patients with this condition.


1. Can myasthenia gravis be cured?
2. What are the risk factors for developing myasthenia gravis?
3. Is myasthenia gravis hereditary?
4. Can pregnancy affect myasthenia gravis?
5. What lifestyle changes can help manage myasthenia gravis symptoms?

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