A50.42

What This Code Means

This is a serious brain infection caused by syphilis that was passed from mother to child before birth and develops later in childhood or adulthood. It causes inflammation of the brain tissue and can lead to neurological problems.

Coding Tips

• •This code is used only for late-onset congenital syphilis (typically after age 2); ensure documentation confirms the infection was acquired congenitally and the encephalitis is a late manifestation
• •Do not use this code for early congenital syphilis or acquired syphilis; verify the patient's age and disease timeline to confirm late congenital presentation