A52.79 ICD-10-CM Code: Other symptomatic late syphilis

A52.79 is the ICD-10-CM diagnosis code for other symptomatic late syphilis. This code describes syphilis in its late stage with various symptoms that don't fit into other specific late syphilis categories. Late syphilis occurs years after the initial infection and can affect multiple body systems including the heart, brain, and bones. A52.79 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).

A52.79 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.

Use this code only after confirming the patient has late (tertiary) syphilis with symptoms that are not better described by more specific A52 codes (such as A52.71 for neurosyphilis or A52.73 for late syphilis of bone).