Secondary syphilis of skin or mucous membranes

This code signifies the manifestation of secondary syphilis affecting the skin or mucous membranes. These lesions, often appearing as rashes or mucocutaneous patches, are a systemic sign of the spirochete infection following the primary chancre stage.

Apply this code when documentation explicitly states secondary syphilis with involvement of the skin (e.g., maculopapular rash, condylomata lata) or mucous membranes (e.g., mucous patches in the mouth). This diagnosis is typically supported by serological tests confirming syphilis infection, along with a clinical examination identifying characteristic lesions.

• Ensure documentation specifies "secondary" syphilis; do not use for primary or latent stages.
• Distinguish from other dermatological conditions that may mimic syphilitic rashes.
• Code any associated systemic manifestations of secondary syphilis separately, if documented.