ICD-10 Code A50.6 – Late congenital syphilis, latent (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A50.6 – Late congenital syphilis, latent
What it is
A50.6 identifies latent late congenital syphilis in a child with evidence of congenital infection but no current symptoms. Use it when the condition is documented as late and latent, not active or symptomatic.
Clinical signs
Clinical features vary; refer to documentation. Latent infection means there are no obvious clinical signs at the time of assessment, although prior evidence of congenital syphilis may be present.
When to use this code
Use this code when the provider documents late congenital syphilis that is latent or asymptomatic. It fits cases where congenital infection was established earlier, but the current record does not describe active manifestations.
Code from the documented diagnosis, not from suspicion alone. If the chart describes specific late complications or active disease, check documentation for a more precise code.
Do not use for
Do not use A50.6 for early congenital syphilis, symptomatic late congenital syphilis, or acquired syphilis. If the record does not clearly state latent disease, check documentation.
Coding tip
Assign A50.6 only when both “late congenital syphilis” and “latent” are documented together.