A52.12 ICD-10-CM Code: Other cerebrospinal syphilis

A52.12 is the ICD-10-CM diagnosis code for other cerebrospinal syphilis. This code describes syphilis that has spread to the brain and spinal cord, causing inflammation and damage to these structures, but is not the typical form of neurosyphilis. It represents a serious stage of untreated syphilis where the infection has invaded the central nervous system. A52.12 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).

A52.12 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 for cerebrospinal syphilis presentations other than general paresis or tabes dorsalis; verify the clinical documentation specifies the type of CNS involvement.