Primary genital syphilis
ICD-10 A66.1 is a billable code used to indicate a diagnosis of primary genital syphilis.
Primary genital syphilis is the initial stage of syphilis infection caused by the bacterium Treponema pallidum. This stage is characterized by the presence of a single or multiple painless ulcers, known as chancres, typically located on the genitalia, anus, or mouth. The chancres appear approximately 3 weeks after exposure to the bacterium and can last for 3 to 6 weeks if untreated. In addition to the local lesions, primary syphilis may also present with regional lymphadenopathy. The disease is primarily transmitted through sexual contact, including vaginal, anal, and oral sex. Geographic distribution of syphilis varies, with higher prevalence rates in urban areas and among certain populations, including men who have sex with men (MSM). Endemic areas include sub-Saharan Africa, parts of Asia, and some regions in the Americas. Early diagnosis and treatment with appropriate antibiotics, typically penicillin, are crucial to prevent progression to secondary syphilis and other complications.
Detailed clinical notes on symptoms, history of exposure, and laboratory results.
Patients presenting with genital ulcers, lymphadenopathy, or atypical rashes.
Consideration of co-infections with HIV or other STIs is crucial for accurate coding.
Photographic evidence of lesions, detailed descriptions of skin findings.
Patients with skin lesions that may be confused with other dermatological conditions.
Differentiating syphilitic lesions from other sexually transmitted infections or dermatological disorders.
Used to confirm diagnosis of primary genital syphilis.
Document the reason for testing and results.
Infectious disease specialists should ensure comprehensive STI screening.
Common symptoms include the appearance of one or more painless ulcers on the genital area, along with swollen lymph nodes in the groin.
