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v1.0.0
ICD-10 Guide
ICD-10 CodesB66.3

B66.3

Echinococcus granulosus infection of liver

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

Code Description

ICD-10 B66.3 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 typically occurs when humans ingest eggs from contaminated food, water, or soil, often associated with contact with infected dogs or livestock. The larvae migrate to the liver, where they form cysts, leading to a condition known as hydatid disease. Symptoms may include abdominal pain, nausea, vomiting, and jaundice, depending on the size and location of the cysts. Complications can arise if the cysts rupture, leading to anaphylactic reactions or secondary infections. Diagnosis is primarily through imaging studies such as ultrasound or CT scans, and serological tests may also be utilized. 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 avoid severe complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between cystic and alveolar echinococcosis
  • Need for imaging studies to confirm diagnosis
  • Potential for complications requiring additional coding
  • Variability in clinical presentation

Audit Risk Factors

  • Inadequate documentation of exposure history
  • Failure to document imaging results
  • Incorrect coding of complications
  • Misidentification of cyst type

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 serological tests and imaging to support diagnosis.

Surgery

Documentation Requirements

Operative reports detailing cyst removal and any complications encountered.

Common Clinical Scenarios

Surgical intervention for large or symptomatic liver cysts.

Billing Considerations

Document the rationale for surgical intervention and any postoperative complications.

Coding Guidelines

Inclusion Criteria

Use B66.3 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the diagnosis, treatment, and any complications
  • Include relevant imaging and laboratory results to support the coding

Exclusion Criteria

Do NOT use B66.3 When
No specific exclusions found.

Related CPT Codes

47562CPT Code

Laparoscopic liver cystectomy

Clinical Scenario

Used when a patient with echinococcosis requires surgical intervention.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Ensure the surgical specialty documents the indication for surgery.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of echinococcosis, 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 echinococcosis, 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, and jaundice, particularly if the cysts are large or rupture.