Latent syphilis, unspecified

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 or not specified in the medical record.

Apply this code when documentation indicates a positive syphilis serology (e.g., RPR, VDRL, FTA-ABS) without any active manifestations of primary, secondary, or tertiary syphilis. This is appropriate when the physician has not specified whether the latent syphilis is early or late.

• Do not use this code if the duration of latency is known (e.g., early latent, late latent).
• Ensure documentation clearly states "latent syphilis, unspecified" or "latent syphilis of unknown duration."
• Distinguish from congenital syphilis or non-venereal treponemal diseases.