ICD-10-CM Billable Code

A51.39

Other secondary syphilis of skin

Clinical Classification Guidelines

Inclusion Terms

  • Syphilitic leukoderma
  • Syphilitic mucous patch

Excludes Type 1

  • late syphilitic leukoderma (A52.79)

Medical Intelligence & Overview

ICD-10 code A51.39 refers to a specific stage of syphilis called secondary syphilis, which affects the skin among other parts of the body. This stage occurs after the initial infection and is characterized by various skin and mucous membrane manifestations. Recognizing these signs is essential for diagnosis and management, although only trained healthcare providers can determine the appropriate treatment.

Causes & Symptoms

Clinical Causes: Bacterial infection with the *Treponema pallidum* spirochete Transmission through direct contact with syphilitic sores during sexual activity Potential mother-to-child transmission during pregnancy if untreated Progression from untreated primary syphilis

Key Symptoms: Skin rashes that are usually non-itchy Lesions such as chancres and mucous patches Palmar and plantar rashes (on palms and soles) Syphilitic leukoderma (depigmentation patches on the skin) Mucous patches in the mouth, throat, or genital areas General symptoms like fever, sore throat, fatigue, and swollen lymph nodes

Diagnostic & Treatment

Diagnosis Path: Diagnosis involves a combination of clinical examination and laboratory testing: - Serologic tests such as non-treponemal tests (e.g., VDRL, RPR) - Treponemal-specific tests (e.g., FTA-ABS, TP-PA) - Skin biopsy or lesion examination might be performed in some cases Clinical history and physical findings support the diagnosis, especially if characteristic skin or mucous membrane lesions are present.

Treatment Protocols: The primary treatment for secondary syphilis includes the use of antibiotics, typically penicillin G administered via intramuscular injection. The treatment plan is usually tailored based on the patient's specific medical circumstances and allergy history. Follow-up testing is necessary to ensure the infection has been effectively treated, and sexual partners should also be evaluated to prevent re-infection or ongoing transmission.

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Clinical Advice & FAQs

Billing Guidance

Is A51.39 a billable ICD-10 code?
Yes, A51.39 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.

Documentation

How do I report A51.39?
Clinical documentation must specify the nature of Other secondary syphilis of skin and any associated comorbidities for accurate reporting.

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syphilis