A50.49 ICD-10-CM Code: Other late congenital neurosyphilis

A50.49 is the ICD-10-CM diagnosis code for other late congenital neurosyphilis. This code describes syphilis that was passed from mother to child before birth and is now causing problems with the nervous system, but doesn't fit into other specific late congenital syphilis categories. It represents complications of untreated maternal syphilis that affect the child's brain and nerves later in life. A50.49 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).

A50.49 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 that the syphilis is congenital (passed from mother to child) and late-onset (typically appearing after age 2) rather than early congenital syphilis to ensure correct code selection.