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ICD-10 Guide
ICD-10 CodesB66.5

B66.5

Schistosomiasis due to Schistosoma mekongi

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

Code Description

ICD-10 B66.5 is a billable code used to indicate a diagnosis of schistosomiasis due to schistosoma mekongi.

Key Diagnostic Point:

Schistosomiasis due to Schistosoma mekongi is a parasitic infection caused by the trematode worm Schistosoma mekongi, primarily found in Southeast Asia, particularly in Cambodia and Laos. This helminthic infection is transmitted through contact with freshwater contaminated with the larvae of the parasite, which penetrate the skin of individuals who come into contact with the water. The disease can lead to a range of symptoms, including abdominal pain, diarrhea, and blood in the urine, as well as more severe complications such as liver fibrosis and portal hypertension if left untreated. Diagnosis is typically made through serological tests or stool/urine examination for eggs. Treatment involves the use of antiparasitic medications, primarily praziquantel, which is effective in killing the adult worms. Early diagnosis and treatment are crucial to prevent long-term complications associated with chronic infection. Public health measures, including improved sanitation and education about avoiding contaminated water, are essential in controlling the spread of this disease.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Specificity of the organism (Schistosoma mekongi) compared to other schistosomes.
  • Need for accurate documentation of exposure history and symptoms.
  • Differentiation from other helminthic infections.
  • Potential for co-infections with other parasitic diseases.

Audit Risk Factors

  • Inadequate documentation of travel history to endemic areas.
  • Failure to document specific symptoms related to schistosomiasis.
  • Misclassification of schistosomiasis type.
  • Lack of supporting lab results for diagnosis.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed travel history, symptomatology, and laboratory results.

Common Clinical Scenarios

Patients presenting with gastrointestinal symptoms after travel to endemic regions.

Billing Considerations

Ensure that all relevant diagnostic tests are documented to support the diagnosis.

Primary Care

Documentation Requirements

Comprehensive patient history and symptom documentation.

Common Clinical Scenarios

Patients with unexplained abdominal pain or hematuria who have traveled to endemic areas.

Billing Considerations

Awareness of local epidemiology and potential exposure risks.

Coding Guidelines

Inclusion Criteria

Use B66.5 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation and laboratory findings
  • Include any relevant co
  • morbidities and ensure specificity in coding

Exclusion Criteria

Do NOT use B66.5 When
No specific exclusions found.

Related CPT Codes

87390CPT Code

Serologic test for schistosomiasis

Clinical Scenario

Used when serological testing is performed to confirm schistosomiasis.

Documentation Requirements

Document the reason for testing and any relevant clinical findings.

Specialty Considerations

Infectious disease specialists should ensure comprehensive documentation of the patient's travel history.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of schistosomiasis, including differentiation by species, which aids in better tracking and management of the disease.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of schistosomiasis, including differentiation by species, which aids in better tracking and management of the disease.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of schistosomiasis, including differentiation by species, which aids in better tracking and management of the disease.

Resources

Clinical References

  • •
    CDC Schistosomiasis Information

Coding & Billing References

  • •
    CDC Schistosomiasis Information

Frequently Asked Questions

What are the common symptoms of schistosomiasis due to Schistosoma mekongi?

Common symptoms include abdominal pain, diarrhea, hematuria, and in chronic cases, liver fibrosis and portal hypertension.

How is schistosomiasis diagnosed?

Diagnosis is typically made through serological tests or by identifying eggs in stool or urine samples.

What is the treatment for schistosomiasis due to Schistosoma mekongi?

The primary treatment is praziquantel, which is effective in killing the adult worms.