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ICD-10 Guide
ICD-10 CodesB66.0

B66.0

Echinococcosis due to Echinococcus granulosus

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

Code Description

ICD-10 B66.0 is a billable code used to indicate a diagnosis of echinococcosis due to echinococcus granulosus.

Key Diagnostic Point:

Echinococcosis, specifically caused by the tapeworm Echinococcus granulosus, is a parasitic infection that primarily affects the liver and lungs, leading to the formation of cysts. Humans become infected through the ingestion of eggs shed in the feces of infected canines, which serve as definitive hosts. The larvae hatch in the intestines and migrate to various organs, where they develop into hydatid cysts. Symptoms may vary depending on the cyst's location and size, ranging from asymptomatic cases to severe complications such as cyst rupture, which can lead to anaphylactic shock or secondary infections. Diagnosis typically involves imaging studies such as ultrasound or CT scans, serological tests, and sometimes histological examination. Treatment options include surgical removal of cysts, percutaneous aspiration, and antiparasitic medications such as albendazole or mebendazole. Early diagnosis and intervention are crucial to prevent serious health complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of clinical presentations depending on cyst location
  • Need for imaging studies for accurate diagnosis
  • Potential for severe complications requiring urgent care
  • Differentiation from other parasitic infections

Audit Risk Factors

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

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, respiratory symptoms, or incidental findings on imaging.

Billing Considerations

Ensure thorough documentation of diagnostic tests and treatment responses.

Surgery

Documentation Requirements

Operative reports detailing cyst removal, imaging studies, and postoperative care.

Common Clinical Scenarios

Surgical intervention for large or symptomatic cysts.

Billing Considerations

Document the rationale for surgical intervention and any complications encountered.

Coding Guidelines

Inclusion Criteria

Use B66.0 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the condition, including the site of the cyst and any complications
  • Include relevant history of exposure to infected animals

Exclusion Criteria

Do NOT use B66.0 When
No specific exclusions found.

Related CPT Codes

47563CPT Code

Laparoscopic cholecystectomy

Clinical Scenario

Used when a hydatid cyst is located in the liver and requires surgical removal.

Documentation Requirements

Operative report detailing the procedure and indication.

Specialty Considerations

Ensure the surgical necessity is well documented.

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 echinococcosis?

Common symptoms include abdominal pain, nausea, vomiting, and respiratory issues, depending on the location of the cysts. Some patients may be asymptomatic.