A52.05 ICD-10-CM Code: Other cerebrovascular syphilis

A52.05 is the ICD-10-CM diagnosis code for other cerebrovascular syphilis. This code describes syphilis that affects blood vessels in the brain, causing complications like stroke or other neurological problems, excluding the specific condition of general paresis of the insane. This is a late-stage manifestation of untreated syphilis affecting the central nervous system. A52.05 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering infections with a predominantly sexual mode of transmission (a50-a64).

A52.05 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

Verify documentation specifies neurosyphilis with cerebrovascular involvement but is NOT general paresis of the insane (GPI), as A52.04 is the specific code for GPI.