Early congenital syphilitic pharyngitis

This code signifies inflammation of the pharynx in an infant due to congenital syphilis, manifesting in the early stages of the disease (typically within the first two years of life). It indicates a direct result of transplacental transmission of Treponema pallidum from mother to fetus.

Use this code when documentation confirms a diagnosis of pharyngitis in a neonate or infant, explicitly attributed to congenital syphilis. Supporting documentation should include a positive syphilis test in the infant, maternal history of syphilis, and clinical findings consistent with pharyngitis.

• Ensure documentation clearly specifies "early" congenital syphilis, as later manifestations have different codes.
• Always code the underlying congenital syphilis (A50.0-A50.9) as the primary diagnosis, with this code as a secondary diagnosis.
• Distinguish from pharyngitis due to other infectious agents, which would be coded differently.