Syphilis of liver and other viscera

This code signifies late syphilis affecting internal organs beyond the cardiovascular or central nervous systems, specifically involving the liver and other visceral structures. It represents a manifestation of tertiary syphilis where spirochetes have disseminated and caused chronic inflammation and damage to these organs.

Apply this code when documentation explicitly states syphilis involving the liver (e.g., syphilitic hepatitis, gumma of the liver) or other internal organs such as the spleen, kidneys, or gastrointestinal tract. This diagnosis is typically supported by serological tests for syphilis and imaging or biopsy findings confirming visceral involvement.

• Ensure documentation specifies "late" or "tertiary" syphilis, or clearly indicates visceral involvement without mention of early stages.
• Do not use this code if the documentation points to congenital syphilis or neurosyphilis/cardiovascular syphilis, as separate codes exist for those conditions.
• Always sequence this code after the primary syphilis diagnosis (A50.x-A53.x) if the stage is known and the visceral involvement is a manifestation of that stage.