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ICD-10 Guide
ICD-10 CodesB48.8

B48.8

Other specified mycoses

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

Code Description

ICD-10 B48.8 is a billable code used to indicate a diagnosis of other specified mycoses.

Key Diagnostic Point:

B48.8 refers to 'Other specified mycoses,' which encompasses a variety of fungal infections that do not fall under more specific categories. Mycoses can affect various body systems, including the skin, lungs, and systemic circulation, particularly in immunocompromised patients. These infections can arise from environmental fungi or opportunistic pathogens, often leading to significant morbidity. Common examples include infections caused by species of Aspergillus, Fusarium, or other less common fungi. Symptoms may vary widely depending on the site of infection and the patient's immune status. In immunocompromised individuals, such as those with HIV/AIDS, cancer, or those on immunosuppressive therapy, the risk of developing severe fungal infections increases significantly. Diagnosis typically involves clinical evaluation, imaging studies, and laboratory tests, including cultures and histopathological examination. Treatment often requires antifungal therapy, which may include agents such as amphotericin B, voriconazole, or echinocandins, depending on the specific organism and site of infection. The management of these infections is critical, as they can lead to severe complications and increased mortality if not promptly addressed.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of fungal pathogens included under this code
  • Need for precise documentation of the specific mycosis
  • Differentiation from other fungal infections
  • Potential for overlapping symptoms with other conditions

Audit Risk Factors

  • Inadequate documentation of the specific fungal organism
  • Failure to note the patient's immunocompromised status
  • Misclassification of the type of mycosis
  • Lack of supporting laboratory results

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical notes on the type of mycosis, patient history, and treatment response.

Common Clinical Scenarios

Patients presenting with atypical fungal infections, especially in immunocompromised states.

Billing Considerations

Ensure that all laboratory results and imaging studies are documented to support the diagnosis.

Pulmonology

Documentation Requirements

Documentation of respiratory symptoms, imaging findings, and any prior lung conditions.

Common Clinical Scenarios

Patients with respiratory symptoms and a history of immunosuppression or exposure to environmental fungi.

Billing Considerations

Document any differential diagnoses considered and the rationale for the final diagnosis.

Coding Guidelines

Inclusion Criteria

Use B48.8 When
  • According to ICD
  • 10 guidelines, B48
  • 8 should be used when the specific type of mycosis is not classified elsewhere
  • Coders must ensure that the documentation supports the diagnosis and that the patient's immunocompromised status is clearly noted

Exclusion Criteria

Do NOT use B48.8 When
No specific exclusions found.

Related CPT Codes

87481CPT Code

Infectious agent detection by nucleic acid (DNA or RNA); fungal, direct probe technique

Clinical Scenario

Used when fungal infections are suspected and require confirmation.

Documentation Requirements

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

Specialty Considerations

Infectious disease specialists should ensure that the test results correlate with clinical findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of mycoses, improving the ability to track and manage fungal infections. B48.8 serves as a catch-all for less common mycoses, which may have been underreported in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of mycoses, improving the ability to track and manage fungal infections. B48.8 serves as a catch-all for less common mycoses, which may have been underreported in ICD-9.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of mycoses, improving the ability to track and manage fungal infections. B48.8 serves as a catch-all for less common mycoses, which may have been underreported in ICD-9.

Resources

Clinical References

  • •
    CDC Fungal Diseases

Coding & Billing References

  • •
    CDC Fungal Diseases

Frequently Asked Questions

When should I use B48.8 instead of a more specific mycosis code?

Use B48.8 when the specific type of mycosis is not clearly documented or when the infection does not fit into other specified categories.