Latent syphilis, unspecified as early or late

This code signifies a stage of syphilis where the patient has serologic evidence of infection but no clinical signs or symptoms of the disease. The duration of the infection is unknown, meaning it cannot be definitively classified as early latent (less than one year duration) or late latent (one year or more duration).

Use this code when laboratory tests (e.g., RPR, VDRL, FTA-ABS) confirm syphilis infection, but the patient is asymptomatic, and the medical record lacks sufficient information to determine the duration of latency. This often occurs when a patient presents for routine screening or contact tracing without a clear history of primary or secondary syphilis.

• Do not use this code if the documentation specifies "early latent syphilis" or "late latent syphilis"; use the more specific codes.
• Ensure documentation clearly states the absence of active symptoms and the inability to determine the duration of latency.
• Consider Z11.3 (Encounter for screening for other sexually transmitted infections) if the encounter is solely for screening and the syphilis diagnosis is newly established.