ICD-10 Code A52.0 – Cardiovascular and cerebrovascular syphilis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A52.0 – Cardiovascular and cerebrovascular syphilis
What it is
A52.0 identifies syphilis involving the heart, blood vessels, or brain circulation. Use it when documentation shows cardiovascular or cerebrovascular complications caused by syphilis.
Clinical signs
Findings may include aortic disease, aneurysm, or other vascular damage linked to syphilis. Cerebrovascular involvement can present with neurologic deficits; clinical features vary, so refer to documentation.
When to use this code
Use A52.0 when the record clearly states cardiovascular or cerebrovascular syphilis, or describes syphilitic disease affecting the aorta, heart, or cerebral vessels. Code the condition only when the provider links the vascular or neurologic findings to syphilis.
Do not use for
Do not use this code for syphilis without cardiovascular or cerebrovascular involvement. Check documentation if the record only mentions late syphilis, neurologic symptoms, or vascular disease without a confirmed syphilitic cause.
Coding tip
Confirm the anatomic site and the provider’s causal link to syphilis before assigning A52.0.