VA Disability Rating for Myasthenia Gravis (DC 8025)
Diagnostic Code 8025 · 38 CFR §4.124a
What Is It?
Myasthenia gravis is an autoimmune disease of the neuromuscular junction: antibodies against the acetylcholine receptor, or against MuSK, block transmission from nerve to muscle. The hallmark is fatigable weakness — muscles work at first and fail with sustained use, then recover with rest — so the disability fluctuates through the day in a way a single snapshot examination will rarely capture. Ptosis and diplopia are the usual first signs; limb, bulbar, and respiratory muscles follow in generalized disease, and a myasthenic crisis with respiratory failure is a medical emergency. 38 CFR §3.309(a) lists "Myasthenia gravis" among the chronic diseases, presumed service-connected under §3.307(a)(3) when manifest to a degree of 10 percent or more within one year of separation. 38 CFR §4.124a opens the neurological schedule with a bracketed instruction: disability from the diseases it lists "may be rated from 10 percent to 100 percent in proportion to the impairment of motor, sensory, or mental function," referring the rater to the appropriate body system of the schedule for each manifestation. Inside the 8000–8025 block the schedule prints either a single flat percentage, a single minimum rating, or no percentage at all — there is no severity ladder anywhere in it. A Note closing the block adds two conditions: the minimum ratings for residuals require ascertainable residuals, and when a rating above the minimum is assigned, the diagnostic codes used as the basis of that evaluation must be cited alongside the code identifying the diagnosis. DC 8025 prints exactly one figure: "Minimum rating — 30." That is a floor, not a tier, and the schedule prints no steps above it.
Rating Criteria
| Rating | Criteria |
|---|---|
| 30% | Minimum rating. This is the only percentage 38 CFR §4.124a attaches to DC 8025, and the schedule prints no steps above it. §4.124a's preamble and §4.120 both govern what happens above the floor: disability in this field is rated in proportion to the impairment of motor, sensory, or mental function, with partial loss of use of one or more extremities from a neurological lesion rated by comparison with the mild, moderate, severe, or complete paralysis of the relevant peripheral nerves. The Note closing the 8000–8025 block requires ascertainable residuals for the minimum and requires that any rating above it cite the diagnostic codes used as its basis. For myasthenia gravis that means ocular involvement is evaluated under §4.79 for diplopia and ptosis, limb weakness by comparison with the peripheral nerve codes, bulbar involvement through its effect on speech and swallowing, and respiratory involvement under the respiratory schedule. |
Evidence Needed
A neurologist's diagnosis supported by acetylcholine receptor or MuSK antibody testing, and by repetitive nerve stimulation or single-fibre EMG showing neuromuscular junction dysfunction, is the foundation. Chest imaging of the thymus matters because thymoma changes the treatment and the prognosis. Because everything above the 30 percent floor is built in proportion to impairment, the evidence that moves the percentage is the fatigability itself, documented rather than described: strength before and after sustained effort, ptosis on sustained upgaze, diplopia measured in the field where it occurs, forced vital capacity, and a swallowing evaluation where bulbar muscles are involved. Records of myasthenic crises, hospitalizations, plasma exchange or IVIG, and the medications you take and what they cost you in side effects complete the picture.
C&P Exam Tips
Schedule the exam late in the day if you can, when fatigable weakness is at its worst, and say so on the record. Ask the examiner to test strength both initially and after sustained effort — that before-and-after comparison is the finding that distinguishes myasthenia gravis from ordinary weakness, and an examiner who tests once will record you as normal. Sustained upgaze demonstrates ptosis; prolonged reading or counting aloud demonstrates bulbar fatigue. Describe your symptoms at their worst — end of day, after exertion, in heat — and report every crisis and hospitalization with dates. List medications and side effects, and explain how you pace your day to work around the weakness, since that pacing is itself evidence of the limitation.
How to File
File VA Form 21-526EZ claiming myasthenia gravis under DC 8025 and cite 38 CFR §4.124a. Attach the antibody results, the electrodiagnostic testing, the thymus imaging, and treatment records including any crises. If the disease became manifest to a degree of 10 percent or more within one year of separation, cite 38 CFR §3.309(a) and §3.307(a)(3). Claim the manifestations by name alongside the diagnosis — the ptosis and diplopia, the limb weakness, the swallowing and speech, the respiratory involvement — because those are the codes any evaluation above 30 percent has to be built from and cited under, and make sure the file documents fatigability rather than a single strength measurement.
Common Mistakes
Reading 30 percent as a mild-case tier with 60 and 100 above it. The schedule prints a minimum and nothing else. Being examined at peak medication effect, or early in the day, when the weakness is at its least. Letting the examiner test strength once instead of before and after sustained effort, which is the whole point of the disease. Leaving myasthenic crises and hospitalizations out of the record. Not documenting respiratory function. Not asking that the decision cite the codes used as the basis of evaluation.
Frequently Asked Questions
Why is the minimum for myasthenia gravis 30 percent?
Because that is the figure 38 CFR §4.124a attaches to DC 8025 — "Minimum rating — 30" — and it is the only one. The section sets minimums for the chronic neurological diseases it lists and then directs that the actual evaluation be made in proportion to the impairment of motor, sensory, or mental function. So the 30 is a floor that recognizes the disease is chronic and fluctuating, not a judgement that a case is mild, and it does not cap anything: the percentage above it is built from the codes for the individual manifestations.
How do I show fatigable weakness at a C&P exam?
By making sure the examination tests it. Fatigable weakness means strength that is normal on first effort and fails on repetition, so a single measurement records a normal result and a repeated one records the disease. Ask explicitly for strength testing before and after sustained effort, sustained upgaze to demonstrate ptosis, and prolonged speech or counting to demonstrate bulbar fatigue. Schedule late in the day if you can and say where you are in your medication cycle. Objective repetitive nerve stimulation or single-fibre EMG results in the file support what the examination shows.
Is there a 60 or 100 percent rating for myasthenia gravis?
Not as a printed tier under DC 8025. The schedule gives the code one figure and prints no steps above it. Veterans with generalized or bulbar disease are routinely evaluated well above 30 percent, but that comes from the proportion rule: each manifestation is evaluated under the schedule for its own system — ocular involvement under §4.79, limb weakness by comparison with the peripheral nerve codes, respiratory involvement under §4.97 — and the Note closing the 8000-8025 block requires the decision to cite the codes it used.