Myasthenia gravis with (acute) exacerbation

This code signifies myasthenia gravis (MG) that is currently experiencing an acute worsening of symptoms. This exacerbation involves a sudden increase in muscle weakness, potentially affecting respiratory function, swallowing, and other voluntary movements. It represents a temporary but significant deterioration from the patient's baseline MG status.

Apply this code when documentation clearly indicates a patient with a pre-existing diagnosis of myasthenia gravis is presenting with an acute exacerbation. This includes scenarios such as increased generalized weakness, dysphagia, dysarthria, or respiratory distress directly attributed to a flare-up of their MG. Physician notes must explicitly state "exacerbation" or describe an acute worsening of MG symptoms.

• Always sequence this code first when it represents the primary reason for the encounter.
• Do not use this code for routine follow-up of stable myasthenia gravis; use G70.00 for those cases.
• Ensure documentation specifies "acute exacerbation" to differentiate from chronic, stable MG.