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ICD-10 Guide
ICD-10 CodesB66.2

B66.2

Echinococcus granulosus infection of liver

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

Code Description

ICD-10 B66.2 is a billable code used to indicate a diagnosis of echinococcus granulosus infection of liver.

Key Diagnostic Point:

Echinococcus granulosus infection of the liver is a parasitic disease caused by the larval stage of the Echinococcus granulosus tapeworm. This infection is primarily transmitted through the ingestion of eggs found in contaminated food or water, or through contact with infected animals, particularly dogs. The larvae migrate to the liver, where they form cysts that can grow and cause various complications, including hepatomegaly, biliary obstruction, and even rupture of the cysts, leading to anaphylactic reactions. Symptoms may be nonspecific and include abdominal pain, nausea, and jaundice. Diagnosis is typically made through imaging studies such as ultrasound or CT scans, which reveal cystic lesions in the liver. Treatment often involves surgical intervention to remove the cysts, along with antiparasitic medications such as albendazole or mebendazole to prevent recurrence. Early diagnosis and treatment are crucial to prevent severe complications associated with this infection.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptoms
  • Need for imaging studies for accurate diagnosis
  • Potential for complications requiring surgical intervention
  • Differentiation from other liver diseases

Audit Risk Factors

  • Inadequate documentation of exposure history
  • Failure to document imaging results
  • Lack of clarity on treatment plans
  • Misclassification of cyst type or severity

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, exposure risk, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with abdominal pain and imaging findings suggestive of liver cysts.

Billing Considerations

Ensure thorough documentation of diagnostic tests and treatment response.

Surgery

Documentation Requirements

Operative reports detailing cyst removal and any complications encountered.

Common Clinical Scenarios

Patients requiring surgical intervention for large or symptomatic liver cysts.

Billing Considerations

Document the surgical approach and any postoperative complications.

Coding Guidelines

Inclusion Criteria

Use B66.2 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the diagnosis, treatment, and any complications
  • Include relevant imaging studies and exposure history

Exclusion Criteria

Do NOT use B66.2 When
No specific exclusions found.

Related CPT Codes

47563CPT Code

Laparoscopic cholecystectomy

Clinical Scenario

Used when cysts cause biliary obstruction.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Ensure accurate coding of the procedure in relation to the diagnosis.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of parasitic infections, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of parasitic infections, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    CDC - Echinococcosis

Coding & Billing References

  • •
    CDC - Echinococcosis

Frequently Asked Questions

What are the common symptoms of Echinococcus granulosus infection?

Common symptoms include abdominal pain, nausea, vomiting, jaundice, and in severe cases, anaphylaxis due to cyst rupture.