A50.43 ICD-10-CM Code: Late congenital syphilitic polyneuropathy

A50.43 is the ICD-10-CM diagnosis code for late congenital syphilitic polyneuropathy. This is a nerve damage condition that develops in children born with syphilis, occurring years after birth as a late complication of the infection passed from mother to child. The condition affects multiple nerves, causing weakness, numbness, or pain in the limbs. A50.43 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).

A50.43 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 requires documentation confirming late congenital syphilis with polyneuropathy manifestation; verify the patient's congenital syphilis status is documented in the medical record.