A50.5Other late congenital syphilis, symptomatic

A50.5 is the ICD-10-CM diagnosis code for other late congenital syphilis, symptomatic. It belongs to category A50 (congenital syphilis), block A50-A64 (infections with a predominantly sexual mode of transmission) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 8 subcodes must be used instead.

Within A50, choose A50.5 (Other late congenital syphilis, symptomatic) only when documentation doesn't support a more specific option: early congenital syphilis, symptomatic (A50.0), early congenital syphilis, latent (A50.1), early congenital syphilis, unspecified (A50.2), late congenital syphilitic oculopathy (A50.3), late congenital neurosyphilis [juvenile neurosyphilis] (A50.4), late congenital syphilis, latent (A50.6), late congenital syphilis, unspecified (A50.7) and unspecified (A50.9).

To report this condition, pick the subcode that matches the documentation: A50.51 (joints), A50.52 (teeth), A50.53 (triad), A50.54 (syphilis), A50.55 (arthropathy), A50.56 (osteochondropathy), A50.57 (nose) and A50.59 (symptomatic).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.