Primary genital syphilis

This code represents the initial stage of syphilis infection, characterized by the presence of a chancre (a painless ulcer) at the site of bacterial entry, typically on the genitals. It is a sexually transmitted infection caused by the bacterium Treponema pallidum.

Use this code when documentation clearly indicates a diagnosis of primary syphilis with the chancre located on the genitalia. Supporting documentation should include a positive serological test for syphilis (e.g., RPR, VDRL, FTA-ABS) and/or direct visualization of the chancre.

• Do not use this code for latent, secondary, or tertiary syphilis; specific codes exist for those stages.
• Ensure the documentation explicitly states "primary" and "genital" to support this specific code.
• Consider co-reporting with codes for other sexually transmitted infections if documented.