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ICD-10 Guide
ICD-10 CodesB40.8

B40.8

Other forms of blastomycosis

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

Code Description

ICD-10 B40.8 is a billable code used to indicate a diagnosis of other forms of blastomycosis.

Key Diagnostic Point:

Blastomycosis is a systemic fungal infection caused by the dimorphic fungus Blastomyces dermatitidis, primarily affecting the lungs but can disseminate to other organs. Other forms of blastomycosis (B40.8) refer to atypical presentations of the disease that do not fit the classic pulmonary or cutaneous forms. These may include disseminated blastomycosis affecting the bones, joints, or central nervous system. Patients may present with a variety of symptoms, including fever, cough, chest pain, and weight loss, or more severe manifestations such as osteomyelitis or meningitis. Diagnosis typically involves clinical evaluation, imaging studies, and laboratory tests, including culture or serology. Treatment usually consists of antifungal medications such as itraconazole or amphotericin B, especially in immunocompromised patients who are at higher risk for severe disease. The management of blastomycosis can be complicated by the patient's immune status, making it crucial for healthcare providers to assess underlying conditions that may predispose patients to more severe infections.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and symptoms
  • Differentiation from other fungal infections
  • Need for comprehensive patient history and immunocompromised status assessment
  • Potential for co-infections or complications

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to specify the form of blastomycosis
  • Misclassification of the severity of the infection
  • Lack of supporting laboratory results

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical notes, laboratory results, and treatment plans.

Common Clinical Scenarios

Patients presenting with respiratory symptoms, fever, and weight loss.

Billing Considerations

Consideration of immunocompromised status and potential for atypical presentations.

Pulmonology

Documentation Requirements

Pulmonary function tests, imaging studies, and symptom assessments.

Common Clinical Scenarios

Patients with chronic cough and suspected pulmonary infections.

Billing Considerations

Differentiation from other pulmonary infections and thorough documentation of respiratory symptoms.

Coding Guidelines

Inclusion Criteria

Use B40.8 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the patient's clinical presentation and any relevant laboratory findings
  • Include details about the patient's immune status and any complications

Exclusion Criteria

Do NOT use B40.8 When
No specific exclusions found.

Related CPT Codes

87481CPT Code

Fungal culture

Clinical Scenario

When a fungal culture is performed to confirm blastomycosis.

Documentation Requirements

Document the reason for the culture and any relevant clinical findings.

Specialty Considerations

Infectious disease specialists should ensure comprehensive documentation of the patient's history.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of blastomycosis, enabling better tracking of the disease and its various forms, which can improve treatment outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of blastomycosis, enabling better tracking of the disease and its various forms, which can improve treatment outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of blastomycosis, enabling better tracking of the disease and its various forms, which can improve treatment outcomes and resource allocation.

Resources

Clinical References

  • •
    CDC Blastomycosis Information

Coding & Billing References

  • •
    CDC Blastomycosis Information

Frequently Asked Questions

What are the common symptoms of blastomycosis?

Common symptoms include fever, cough, chest pain, and weight loss. In disseminated cases, symptoms may vary based on the affected organs.

How is blastomycosis diagnosed?

Diagnosis typically involves clinical evaluation, imaging studies, and laboratory tests, including culture or serology.

What is the treatment for blastomycosis?

Treatment usually involves antifungal medications such as itraconazole or amphotericin B, especially in severe cases or in immunocompromised patients.