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v1.0.0
ICD-10 Guide
ICD-10 CodesB66.4

B66.4

Echinococcus granulosus infection of liver

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

Code Description

ICD-10 B66.4 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, water, or soil, often associated with contact with infected dogs or livestock. The larvae develop into cysts in the liver, leading to hydatid disease, which can cause significant morbidity. Patients may present with abdominal pain, hepatomegaly, and jaundice, and complications can include cyst rupture, secondary bacterial infection, and anaphylactic reactions. Diagnosis is typically made through imaging studies such as ultrasound or CT scans, which reveal cystic lesions in the liver. Treatment options include surgical intervention to remove the cysts, along with antiparasitic medications such as albendazole or mebendazole to reduce the risk of recurrence. Early diagnosis and management are crucial to prevent severe complications associated with this infection.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of parasitic infections and their transmission.
  • Differentiation from other liver conditions is necessary.
  • Documentation must specify the location and nature of the infection.
  • Knowledge of treatment protocols and follow-up care is essential.

Audit Risk Factors

  • Inadequate documentation of the infection's severity.
  • Failure to document the presence of cysts or complications.
  • Incorrect coding of related procedures or treatments.
  • Lack of follow-up documentation post-treatment.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical history, diagnostic imaging results, and treatment plans.

Common Clinical Scenarios

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

Billing Considerations

Ensure that all diagnostic tests and treatments are clearly documented to support coding.

Surgery

Documentation Requirements

Operative reports detailing cyst removal and any complications encountered.

Common Clinical Scenarios

Surgical intervention for large or symptomatic hydatid cysts.

Billing Considerations

Document the surgical approach and any postoperative care provided.

Coding Guidelines

Inclusion Criteria

Use B66.4 When
  • According to ICD
  • 10 coding guidelines, B66
  • 4 should be used when the infection is confirmed and documented
  • It is important to include any associated complications or related conditions in the coding process

Exclusion Criteria

Do NOT use B66.4 When
  • Exclusion criteria include other types of echinococcal infections not affecting the liver

Related CPT Codes

47562CPT Code

Laparoscopic cholecystectomy

Clinical Scenario

Performed for symptomatic hydatid cysts in the liver.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Ensure that the diagnosis of Echinococcus granulosus is clearly linked to the surgical procedure.

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, including Echinococcus granulosus, which enhances data accuracy and improves patient care tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of parasitic infections, including Echinococcus granulosus, which enhances data accuracy and improves patient care tracking.

Reimbursement & Billing Impact

reimbursement.

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, hepatomegaly, jaundice, and in severe cases, anaphylaxis due to cyst rupture.