358.1 Myasthenic syndromes in diseases classified elsewhere
Eaton-Lambert syndrome from stated cause classified elsewhere
Code first underlying disease, as:
botulism (005.1, 040.41-040.42)
hypothyroidism (244.0-244.9)
malignant neoplasm (140.0-208.9)
pernicious anemia (281.0)
thyrotoxicosis (242.0-242.9)