ICD-10 Code A50.9 – Congenital syphilis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A50.9 – Congenital syphilis, unspecified
What it is
A50.9 identifies congenital syphilis when the infection is present at birth but the record does not specify a particular manifestation. Use this code when documentation confirms congenital syphilis without further detail.
Clinical signs
Clinical features vary; refer to documentation. Congenital syphilis may present with findings consistent with neonatal infection, but this code itself does not require a listed sign or organ involvement.
When to use this code
Use A50.9 when the provider documents congenital syphilis and does not describe the type or specific complications. It is appropriate for newborn or infant records that confirm the diagnosis but remain nonspecific. If the chart names a more specific congenital syphilis category, code that instead.
Do not use for
Do not use this code for acquired syphilis or for congenital syphilis with a documented manifestation that has its own code. Check documentation when the record is unclear or incomplete.
Coding tip
Choose the most specific congenital syphilis code available; use A50.9 only when the provider leaves it unspecified.