ICD-10 Code A50.59 – Other late congenital syphilis, symptomatic (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A50.59 – Other late congenital syphilis, symptomatic
What it is
A50.59 identifies symptomatic late congenital syphilis that does not fit a more specific late-congenital syphilis code. It applies when a child or older patient has documented manifestations from congenital infection acquired before birth.
Clinical signs
Clinical features vary; refer to documentation. Late congenital syphilis may present with skeletal changes, dental abnormalities, eye or ear involvement, or other chronic findings linked to congenital infection.
When to use this code
Use this code when the record clearly states late congenital syphilis and the patient has symptoms or signs, but no more specific late-congenital manifestation is documented. It is appropriate for confirmed congenital infection with ongoing clinical findings. Check documentation if the chart only mentions exposure, screening, or suspected disease.
Do not use for
Do not use this code for asymptomatic congenital syphilis, unspecified congenital syphilis, or acquired syphilis in later life. Check documentation if the provider has assigned a different late congenital syphilis subtype.
Coding tip
Confirm both congenital origin and current symptoms in the note before assigning A50.59.