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ICD-10 Guide
ICD-10 CodesA59.00

A59.00

Urogenital trichomoniasis, unspecified

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

Code Description

ICD-10 A59.00 is a billable code used to indicate a diagnosis of urogenital trichomoniasis, unspecified.

Key Diagnostic Point:

Urogenital trichomoniasis is a sexually transmitted infection caused by the protozoan parasite Trichomonas vaginalis. It primarily affects the urogenital tract, leading to symptoms such as vaginal discharge, itching, and discomfort in women, while men may experience urethral discharge and irritation. However, many individuals remain asymptomatic, which complicates diagnosis and increases the risk of transmission. The infection is typically transmitted through sexual contact, making it crucial for healthcare providers to conduct thorough sexual histories and consider contact tracing for partners. Diagnosis is often confirmed through laboratory testing, including wet mount microscopy or nucleic acid amplification tests (NAATs). Treatment usually involves the administration of metronidazole or tinidazole, with recommendations for both the infected individual and their sexual partners to prevent reinfection. Given the potential for asymptomatic cases, routine screening in high-risk populations is advised. Proper education on safe sexual practices is essential to reduce the incidence of this infection.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Asymptomatic cases complicate diagnosis and coding.
  • Need for accurate sexual history documentation.
  • Potential for co-infection with other STIs.
  • Variability in symptoms among different populations.

Audit Risk Factors

  • Inadequate documentation of symptoms.
  • Failure to document partner treatment.
  • Misclassification of asymptomatic cases.
  • Lack of follow-up documentation.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, including sexual history and symptomatology.

Common Clinical Scenarios

Diagnosis and management of STIs, including contact tracing.

Billing Considerations

Consideration of co-infections and comprehensive treatment plans.

Gynecology

Documentation Requirements

Documentation of gynecological exams, lab results, and treatment plans.

Common Clinical Scenarios

Management of vaginal infections and routine STI screenings.

Billing Considerations

Importance of discussing sexual health and safe practices with patients.

Coding Guidelines

Inclusion Criteria

Use A59.00 When
  • According to ICD
  • 10 guidelines, A59
  • 00 should be used when the specific type of urogenital trichomoniasis is not documented
  • It is essential to ensure that the diagnosis is confirmed through appropriate testing

Exclusion Criteria

Do NOT use A59.00 When
No specific exclusions found.

Related CPT Codes

87520CPT Code

Nucleic acid amplification test for Trichomonas vaginalis

Clinical Scenario

Used for confirming diagnosis in symptomatic or asymptomatic patients.

Documentation Requirements

Document the reason for testing and patient symptoms.

Specialty Considerations

Infectious disease specialists may require additional lab results.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of trichomoniasis, improving data accuracy and facilitating better tracking of STIs.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of trichomoniasis, improving data accuracy and facilitating better tracking of STIs.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of trichomoniasis, improving data accuracy and facilitating better tracking of STIs.

Resources

Clinical References

  • •
    CDC Trichomoniasis Fact Sheet

Coding & Billing References

  • •
    CDC Trichomoniasis Fact Sheet

Frequently Asked Questions

What is the primary treatment for urogenital trichomoniasis?

The primary treatment for urogenital trichomoniasis is metronidazole or tinidazole, which should be administered to both the infected individual and their sexual partners.