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ICD-10 Guide
ICD-10 CodesB44.7

B44.7

Aspergillosis of lung

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

Code Description

ICD-10 B44.7 is a billable code used to indicate a diagnosis of aspergillosis of lung.

Key Diagnostic Point:

Aspergillosis of the lung is a fungal infection caused by the Aspergillus species, primarily Aspergillus fumigatus. This condition can manifest in various forms, including allergic bronchopulmonary aspergillosis (ABPA), chronic pulmonary aspergillosis (CPA), and invasive aspergillosis. Patients with compromised immune systems, such as those undergoing chemotherapy, organ transplant recipients, or individuals with HIV/AIDS, are particularly susceptible to invasive forms of the disease. Symptoms may include cough, hemoptysis, fever, and chest pain, which can lead to significant morbidity if not treated promptly. Diagnosis typically involves imaging studies, such as chest X-rays or CT scans, and microbiological cultures or serological tests to confirm the presence of Aspergillus. Treatment often includes antifungal medications such as voriconazole or amphotericin B, and in some cases, surgical intervention may be necessary to remove infected tissue. The management of aspergillosis requires careful consideration of the patient's immune status and overall health, making it a complex condition to treat effectively.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Variety of clinical presentations (ABPA, CPA, invasive aspergillosis)
  • Need for precise documentation of immunocompromised status
  • Differentiation from other pulmonary infections
  • Potential for co-morbid conditions affecting treatment

Audit Risk Factors

  • Inadequate documentation of immunocompromised status
  • Failure to specify the type of aspergillosis
  • Lack of supporting diagnostic tests in the medical record
  • Incorrect coding of related respiratory conditions

Specialty Focus

Medical Specialties

Pulmonology

Documentation Requirements

Detailed clinical history, imaging results, and laboratory findings must be documented.

Common Clinical Scenarios

Patients presenting with chronic cough, hemoptysis, or recurrent pneumonia.

Billing Considerations

Consideration of underlying lung diseases and immunocompromised states.

Infectious Disease

Documentation Requirements

Comprehensive documentation of the patient's immune status and response to antifungal therapy.

Common Clinical Scenarios

Patients with a history of organ transplantation or those on immunosuppressive therapy.

Billing Considerations

Monitoring for treatment efficacy and potential drug interactions.

Coding Guidelines

Inclusion Criteria

Use B44.7 When
  • According to ICD
  • 10 guidelines, B44
  • 7 should be used when the documentation specifies aspergillosis affecting the lung
  • It is important to ensure that the diagnosis is confirmed through appropriate testing and that the patient's immunocompromised status is clearly documented

Exclusion Criteria

Do NOT use B44.7 When
No specific exclusions found.

Related CPT Codes

88305CPT Code

Pathology examination, surgical

Clinical Scenario

Used when lung tissue is biopsied to confirm aspergillosis.

Documentation Requirements

Pathology report must be included.

Specialty Considerations

Pulmonology and Infectious Disease specialists should ensure accurate reporting.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of aspergillosis, improving the accuracy of data collection and reimbursement processes. It has also facilitated better tracking of fungal infections in immunocompromised populations.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of aspergillosis, improving the accuracy of data collection and reimbursement processes. It has also facilitated better tracking of fungal infections in immunocompromised populations.

Reimbursement & Billing Impact

reimbursement processes. It has also facilitated better tracking of fungal infections in immunocompromised populations.

Resources

Clinical References

  • •
    CDC Aspergillosis Information

Coding & Billing References

  • •
    CDC Aspergillosis Information

Frequently Asked Questions

What are the common symptoms of aspergillosis of the lung?

Common symptoms include cough, hemoptysis, fever, chest pain, and difficulty breathing. Symptoms may vary based on the type of aspergillosis and the patient's immune status.