Neonatal myasthenia gravis

This code signifies a transient form of muscle weakness present at birth in a neonate, caused by the passive transfer of acetylcholine receptor antibodies from a mother with myasthenia gravis. It results in generalized hypotonia, feeding difficulties, and respiratory distress, typically resolving within a few weeks to months.

Use this code when a newborn exhibits signs of myasthenia gravis, such as poor suck, weak cry, or respiratory compromise, and the mother has a confirmed diagnosis of myasthenia gravis. Documentation should clearly state the neonatal onset of symptoms and the maternal history of myasthenia gravis.

• Ensure documentation specifies "neonatal" to differentiate from other forms of myasthenia gravis.
• Do not confuse with congenital myasthenia gravis, which is a distinct genetic disorder.
• Sequence as the primary diagnosis when it is the reason for the encounter.