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v1.0.0
ICD-10 Guide
ICD-10 CodesB66.1

B66.1

Echinococcus granulosus infection of liver

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

Code Description

ICD-10 B66.1 is a billable code used to indicate a diagnosis of echinococcus granulosus infection of liver.

Key Diagnostic Point:

Echinococcus granulosus infection of the liver, also known as hydatid disease, is caused by the larval stage of the Echinococcus granulosus tapeworm. This parasitic infection primarily affects the liver, leading to the formation of cysts that can vary in size and number. The cysts may remain asymptomatic for years but can cause significant complications if they rupture, leading to anaphylactic reactions or secondary infections. Symptoms may include abdominal pain, nausea, vomiting, and jaundice, depending on the size and location of the cysts. Diagnosis is typically made through imaging studies such as ultrasound, CT scans, or MRI, which reveal the characteristic cystic lesions. Treatment often involves surgical intervention to remove the cysts, along with antiparasitic medications such as albendazole or mebendazole to prevent recurrence. The disease is more prevalent in areas where livestock is raised, as the tapeworm's lifecycle involves dogs as definitive hosts and humans as accidental hosts.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between cystic and non-cystic liver lesions
  • Understanding the lifecycle of Echinococcus granulosus
  • Identifying potential complications from cyst rupture
  • Navigating the use of antiparasitic treatments alongside surgical interventions

Audit Risk Factors

  • Inadequate documentation of imaging results
  • Failure to document the presence of symptoms
  • Misclassification of cyst type (e.g., simple vs. complicated)
  • Lack of clarity on treatment plans (surgical vs. medical)

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, including travel and exposure risks, 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 symptoms and diagnostic tests are documented to support the diagnosis.

Surgery

Documentation Requirements

Operative reports detailing the surgical approach and findings during cyst removal.

Common Clinical Scenarios

Patients undergoing laparoscopic or open surgery for cyst excision.

Billing Considerations

Document the rationale for surgical intervention and any complications encountered.

Coding Guidelines

Inclusion Criteria

Use B66.1 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the diagnosis, treatment, and any complications
  • Include relevant imaging studies and laboratory results to support the diagnosis

Exclusion Criteria

Do NOT use B66.1 When
No specific exclusions found.

Related CPT Codes

47562CPT Code

Laparoscopic cholecystectomy

Clinical Scenario

Used when cysts are removed laparoscopically.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Ensure that the surgical approach is clearly documented.

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. B66.1 provides a clear distinction for Echinococcus granulosus infections, which aids in epidemiological tracking and treatment planning.

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. B66.1 provides a clear distinction for Echinococcus granulosus infections, which aids in epidemiological tracking and treatment planning.

Reimbursement & Billing Impact

reimbursement processes. B66.1 provides a clear distinction for Echinococcus granulosus infections, which aids in epidemiological tracking and treatment planning.

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.

How is Echinococcus granulosus infection diagnosed?

Diagnosis is typically made through imaging studies such as ultrasound, CT scans, or MRI, which reveal characteristic cystic lesions in the liver.

What treatments are available for Echinococcus granulosus infection?

Treatment often involves surgical removal of the cysts, along with antiparasitic medications like albendazole or mebendazole to prevent recurrence.