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ICD-10 Guide
ICD-10 CodesA51.42

A51.42

Secondary syphilitic female pelvic disease

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 A51.42 is a billable code used to indicate a diagnosis of secondary syphilitic female pelvic disease.

Key Diagnostic Point:

Secondary syphilitic female pelvic disease is a manifestation of secondary syphilis, which occurs when Treponema pallidum, the bacterium responsible for syphilis, spreads throughout the body after the initial infection. In women, this can lead to pelvic inflammatory disease (PID), characterized by inflammation of the female reproductive organs, including the uterus, fallopian tubes, and ovaries. Symptoms may include pelvic pain, abnormal vaginal discharge, fever, and dyspareunia. Diagnosis is typically made through serological testing for syphilis, including non-treponemal tests (e.g., RPR, VDRL) and treponemal tests (e.g., FTA-ABS). Treatment involves the administration of benzathine penicillin G, which is the first-line therapy for syphilis. It is crucial to conduct contact tracing to identify and treat sexual partners to prevent reinfection and further transmission. Regular follow-up is necessary to monitor treatment efficacy and manage any complications that may arise.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of sexually transmitted infections (STIs) and their complications.
  • Involves knowledge of serological testing and interpretation.
  • Documentation must clearly indicate the secondary nature of the disease.
  • Need for accurate coding of associated conditions (e.g., PID).

Audit Risk Factors

  • Inadequate documentation of symptoms and clinical findings.
  • Failure to document serological test results.
  • Lack of evidence for contact tracing efforts.
  • Misdiagnosis or coding of related conditions.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed history of sexual activity, serological test results, and treatment plans.

Common Clinical Scenarios

Patients presenting with pelvic pain and a history of syphilis.

Billing Considerations

Need for comprehensive STI screening and management of co-infections.

Gynecology

Documentation Requirements

Pelvic examination findings, imaging results, and treatment response.

Common Clinical Scenarios

Women with PID symptoms and a positive syphilis test.

Billing Considerations

Awareness of the implications of STIs on reproductive health.

Coding Guidelines

Inclusion Criteria

Use A51.42 When
  • According to ICD
  • 10 guidelines, A51
  • 42 should be used when the patient has a confirmed diagnosis of secondary syphilis with pelvic involvement
  • It is essential to document the clinical findings and any associated conditions

Exclusion Criteria

Do NOT use A51.42 When
  • Exclusion criteria include cases where syphilis is not confirmed or where pelvic disease is due to other etiologies

Related CPT Codes

86592CPT Code

Syphilis serology test

Clinical Scenario

Used when testing for syphilis in patients with pelvic symptoms.

Documentation Requirements

Document the reason for testing and any relevant clinical findings.

Specialty Considerations

Infectious disease specialists should ensure comprehensive STI screening.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of syphilis and its complications, improving the accuracy of data collection and reimbursement processes. A51.42 provides a clear indication of the condition's complexity and associated risks.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of syphilis and its complications, improving the accuracy of data collection and reimbursement processes. A51.42 provides a clear indication of the condition's complexity and associated risks.

Reimbursement & Billing Impact

reimbursement processes. A51.42 provides a clear indication of the condition's complexity and associated risks.

Resources

Clinical References

  • •
    CDC Syphilis Treatment Guidelines

Coding & Billing References

  • •
    CDC Syphilis Treatment Guidelines

Frequently Asked Questions

What are the common symptoms of secondary syphilitic female pelvic disease?

Common symptoms include pelvic pain, abnormal vaginal discharge, fever, and dyspareunia. Patients may also experience systemic symptoms such as rash or lymphadenopathy.