ICD-10 Code A52.09 – Other Cardiovascular Syphilis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A52.09 – Other cardiovascular syphilis
What it is
This code identifies cardiovascular disease caused by syphilis when the specific heart or vessel manifestation is not otherwise classified. Use it for late syphilitic involvement of the cardiovascular system.
Clinical signs
Clinical features vary; refer to documentation. Findings may include aortic or other cardiovascular involvement linked to syphilis, with diagnosis supported by the clinician’s assessment and relevant history.
When to use this code
Use A52.09 when the provider documents cardiovascular syphilis but does not specify a more exact subtype. It is appropriate for coded records describing syphilitic disease affecting the cardiovascular system without another listed manifestation.
If the note only says “syphilis” or gives a different organ involvement, check documentation before assigning this code. Make sure the record clearly supports cardiovascular involvement.
Do not use for
Do not use this code for congenital syphilis, neurosyphilis, or noncardiovascular syphilis. If the cardiovascular manifestation is specified elsewhere, code that more precise diagnosis instead.
Coding tip
Verify that “cardiovascular” is documented and that no more specific syphilis code applies before selecting A52.09.