Last Updated September 17, 2026
Conditions Center · Neurological · Social Security Disability
Also called MG, autoimmune myasthenia.
Myasthenia gravis can support SSDI or SSI when documented fatigable weakness meets Listing 11.12 despite treatment, or when residual function rules out sustained work. Fluctuating symptoms, a positive antibody, or a thymectomy history is not an approval. SSA looks at strength and bulbar function on treatment, crisis history, and whether the person can sustain a full workday.
What is Myasthenia Gravis?
NINDS describes myasthenia gravis as an autoimmune neuromuscular disease in which antibodies interfere with communication between nerves and muscles. Weakness often worsens with activity and improves with rest. Ocular, bulbar, limb, and respiratory muscles can be involved. Crisis with respiratory failure is a medical emergency.
Common symptoms of Myasthenia Gravis
- Fatigable weakness of the eyelids, extraocular muscles, face, or limbs
- Difficulty chewing, swallowing, or speaking as the day progresses
- Shortness of breath or weak cough during exacerbations
- Improvement after rest or acetylcholinesterase-inhibitor doses in some people
- Crisis requiring intensive respiratory support in severe cases
How can Myasthenia Gravis affect a person’s ability to work?
- Inability to sustain looking, speaking, lifting, or walking through a shift
- Need for unscheduled rest after brief activity
- Absences for infusions, plasma exchange, or hospitalizations
- Safety limits if diplopia, choking, or respiratory weakness is documented
- Reduced public-facing work when dysarthria or ptosis fluctuates
Does Social Security have a Listing for Myasthenia Gravis?
Social Security currently has listing criteria that may apply: 11.12 (Myasthenia gravis). Meeting a listing requires the specific medical findings in that listing, not only the diagnosis.
Listing 11.12 requires the specified motor, bulbar, or combined physical-and-mental criteria despite adherence to prescribed treatment for at least three months (see 11.00C). Pathway B includes a myasthenic crisis requiring mechanical ventilation, or need for supplemental enteral nutrition via gastrostomy or parenteral nutrition via a central venous catheter.
SSA applies Listing 11.12 only when limitations persist despite adherence to prescribed treatment for at least three months. Crisis with mechanical ventilation or specified nutritional support can meet pathway B. If the listing is not met, RFC should reflect fatigability across a workday, not a single morning examination.
Can you qualify if you do not meet an SSA Listing?
Yes. Fatigable weakness that does not meet 11.12 may still preclude full-time work through RFC.
What medical evidence may help document Myasthenia Gravis?
- Neurology records diagnosing MG and documenting treatment adherence
- Antibody, electrodiagnostic, or ice-pack / edrophonium findings used clinically
- Crisis, ICU, and ventilation records
- Speech, swallow, and respiratory assessments
- Infusion or plasma-exchange calendars
Testing, imaging, and laboratory studies
- AChR or MuSK antibody testing when obtained
- Repetitive-nerve-stimulation or single-fiber EMG
- Pulmonary-function testing during exacerbations when used
The record should document prescribed treatments such as pyridostigmine, steroids or other immunosuppressants, IVIG, plasma exchange, complement or FcRn inhibitors, and thymectomy when used, together with treatment response and side effects. Relevant reasons for treatment gaps can also help explain the longitudinal course.
How SSA may evaluate residual functional capacity
RFC should describe how long the person can speak, look, lift, or walk before weakness forces rest. A normal morning exam does not resolve afternoon function.
Supported limits may include reduced lifting, limited overhead work, extra breaks, and avoidance of heat or infection exposure that historically triggers weakness.
Common issues that can weaken a disability claim involving Myasthenia Gravis
A claim may be harder to support when the record contains only an antibody result without functional evidence, does not document the treatment period relevant to Listing 11.12, or describes crisis-level weakness without corresponding emergency or hospital records.
What may strengthen the medical documentation
Treating-neurologist notes on treatment and fatigability, crisis records, and observations of function later in the day.
Myasthenia Gravis and related medical conditions
- Amyotrophic Lateral Sclerosis — A progressive motor neuron disease evaluated under Listing 11.10. Adult ALS is also on SSA’s Compassionate Allowances list for expedited case processing when the documented diagnosis meets applicable rules.
- Multiple Sclerosis — A central nervous system disease that can affect movement, vision, sensation, fatigue, and cognition. SSA evaluates multiple sclerosis under Listing 11.09 when its specific criteria are documented.
- Muscular Dystrophy — SSA evaluates muscular dystrophy under Listing 11.13 using extreme motor limits in two extremities or marked physical plus marked mental limitation. Some named dystrophies appear on the current CAL list; not every MD diagnosis does.
- Peripheral Neuropathy — Damage to peripheral nerves that may cause pain, numbness, weakness, or balance problems. Listing 11.14 applies only when its specified functional criteria are met.
- Respiratory Failure — Listing 3.14 evaluates respiratory failure caused by a chronic respiratory disorder other than cystic fibrosis when qualifying invasive ventilation or BiPAP is required twice in 12 months under the listing's timing rules. Cystic-fibrosis-related respiratory failure is evaluated under Listing 3.04D, and CPAP does not substitute for qualifying ventilation.
How Brock & Stout may help
We compare the file with Listing 11.12, document treatment adherence and crisis history, and develop an RFC that reflects fatigability. Representation cannot guarantee approval.
Frequently asked questions
No. Listing 11.12 is based on documented functional criteria despite treatment, not on serology alone.
Pathway 11.12B includes a myasthenic crisis requiring mechanical ventilation. The official listing text controls.
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Speak with a Social Security Disability attorney
If Myasthenia Gravis is affecting your ability to work, Brock & Stout can review the claim, look for missing medical evidence, and discuss next steps. If we represent you, you do not owe attorney fees or case costs if the claim is denied.
Prefer to send us your information? Request a case evaluation.
This page is general educational information about Social Security Disability as of the date of this publication. It is not legal or medical advice, does not create an attorney-client relationship, and does not guarantee results. Eligibility depends on individual facts and current Social Security rules.
