A52.13 ICD-10-CM Code: Late syphilitic meningitis

A52.13 is the ICD-10-CM diagnosis code for late syphilitic meningitis. This is a serious brain infection caused by syphilis that develops years after the initial infection. It causes inflammation of the membranes surrounding the brain and spinal cord, leading to symptoms like headaches, fever, and stiff neck. A52.13 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).

A52.13 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.

This code is used only for late-stage syphilis (occurring more than 2 years after initial infection); verify documentation confirms late syphilis rather than early or congenital syphilis.