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ICD-10 Guide
ICD-10 CodesA59.8

A59.8

Other specified trichomoniasis

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

Code Description

ICD-10 A59.8 is a billable code used to indicate a diagnosis of other specified trichomoniasis.

Key Diagnostic Point:

Trichomoniasis is a sexually transmitted infection (STI) caused by the protozoan parasite Trichomonas vaginalis. It primarily affects the urogenital tract in both men and women, leading to symptoms such as vaginal discharge, itching, and discomfort during urination in women, while men may experience urethritis or be asymptomatic. The 'Other specified trichomoniasis' code (A59.8) is used when the specific type of trichomoniasis is not classified elsewhere in the ICD-10 coding system. This code is essential for capturing cases that do not fit into the more common categories of trichomoniasis, allowing for better tracking and management of this infection. Effective treatment typically involves the use of metronidazole or tinidazole, and it is crucial to treat sexual partners to prevent reinfection. Contact tracing is a vital component of managing trichomoniasis, as it helps identify and treat individuals who may have been exposed to the infection, thereby reducing transmission rates.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptoms
  • Need for accurate documentation of specific type of trichomoniasis
  • Differentiation from other STIs with similar symptoms
  • Potential for co-infection with other pathogens

Audit Risk Factors

  • Inadequate documentation of symptoms and clinical findings
  • Failure to document treatment and follow-up care
  • Misclassification of the type of trichomoniasis
  • Lack of contact tracing documentation

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, symptomatology, and treatment plans must be documented.

Common Clinical Scenarios

Patients presenting with recurrent STIs, atypical symptoms, or complications from trichomoniasis.

Billing Considerations

Consideration of co-infections and comprehensive STI screening is essential.

Gynecology

Documentation Requirements

Documentation of gynecological examinations, lab results, and treatment regimens.

Common Clinical Scenarios

Women presenting with vaginal discharge, itching, or pelvic pain.

Billing Considerations

Documentation should include sexual history and partner treatment.

Coding Guidelines

Inclusion Criteria

Use A59.8 When
  • According to ICD
  • 10 coding guidelines, A59
  • 8 should be used when the specific type of trichomoniasis is not classified elsewhere
  • Coders should ensure that the diagnosis is supported by clinical documentation and that any related conditions are also coded appropriately

Exclusion Criteria

Do NOT use A59.8 When
No specific exclusions found.

Related CPT Codes

87110CPT Code

Trichomonas vaginalis test

Clinical Scenario

Used when testing for trichomoniasis in symptomatic patients.

Documentation Requirements

Document the reason for testing and any symptoms present.

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 trichomoniasis, enabling better tracking of infection rates and treatment outcomes. A59.8 provides a means to capture cases that do not fit into standard classifications, improving data accuracy.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of trichomoniasis, enabling better tracking of infection rates and treatment outcomes. A59.8 provides a means to capture cases that do not fit into standard classifications, improving data accuracy.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of trichomoniasis, enabling better tracking of infection rates and treatment outcomes. A59.8 provides a means to capture cases that do not fit into standard classifications, improving data accuracy.

Resources

Clinical References

  • •
    CDC Trichomoniasis Fact Sheet

Coding & Billing References

  • •
    CDC Trichomoniasis Fact Sheet

Frequently Asked Questions

What is the significance of coding A59.8?

Coding A59.8 allows for the identification and tracking of cases of trichomoniasis that do not fit into standard categories, which is crucial for public health monitoring and treatment strategies.