A51.0
Primary genital syphilis
Clinical Classification Guidelines
Inclusion Terms
- Syphilitic chancre NOS
Medical Intelligence & Overview
Primary genital syphilis, classified under ICD-10 code A51.0, is the initial stage of a sexually transmitted infection caused by the bacterium Treponema pallidum. This stage is characterized by the appearance of a sore known as a chancre at the site where the bacteria entered the body, commonly on the genitals. As the first sign of infection, early diagnosis and treatment are essential to prevent progression and transmission to others.
Causes & Symptoms
Clinical Causes: Unprotected sexual contact with an infected person, especially during vaginal, anal, or oral sex. Contact with genital sores or rashes of an infected individual. Other forms of intimate contact involving exposure to infectious syphilitic lesions.
Key Symptoms: Development of a painless, firm, round sore called a chancre at the site of bacterial entry, usually appearing 3 weeks after exposure. The chancre is typically single but can be multiple. Lymph nodes near the sore may become swollen and tender. The sore often heals on its own within 3 to 6 weeks, even without treatment.
Diagnostic & Treatment
Diagnosis Path: Diagnosis involves a physical examination to identify the chancre and associated lymphadenopathy. Laboratory tests are crucial for confirmation and include:
Treatment Protocols: Primary genital syphilis is effectively treated with antibiotics, most commonly benzathine penicillin G. Alternative treatments for penicillin-allergic individuals include doxycycline or tetracycline. Early treatment is vital to:
Clinical Advice & FAQs
Billing Guidance
Is A51.0 a billable ICD-10 code?
Yes, A51.0 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report A51.0?
Clinical documentation must specify the nature of Primary genital syphilis and any associated comorbidities for accurate reporting.
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