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v1.0.0
ICD-10 Guide
ICD-10 CodesB48

B48

Other mycoses, not elsewhere classified

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

Code Description

ICD-10 B48 is a billable code used to indicate a diagnosis of other mycoses, not elsewhere classified.

Key Diagnostic Point:

B48 encompasses a variety of fungal infections that do not fit into more specific categories of mycoses. These infections can arise from various fungal pathogens and may present in diverse clinical manifestations. Commonly, they affect immunocompromised patients, including those with HIV/AIDS, cancer, or those on immunosuppressive therapies. Symptoms can range from mild skin irritations to severe systemic infections. Diagnosis often requires a combination of clinical evaluation, laboratory tests, and imaging studies. Treatment typically involves antifungal medications, which may include azoles, echinocandins, or polyenes, depending on the specific fungus and the severity of the infection. The management of these infections is critical, especially in vulnerable populations, as they can lead to significant morbidity and mortality if not promptly addressed.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of fungal pathogens involved
  • Diverse clinical presentations
  • Need for laboratory confirmation
  • Potential overlap with other mycoses

Audit Risk Factors

  • Inadequate documentation of the specific fungal infection
  • Failure to document the patient's immunocompromised status
  • Misclassification of the infection type
  • Lack of supporting lab results

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical notes, lab results, and treatment plans.

Common Clinical Scenarios

Patients with opportunistic infections due to immunosuppression.

Billing Considerations

Ensure clear documentation of the patient's immune status and any prior treatments.

Dermatology

Documentation Requirements

Photographic evidence of skin lesions, biopsy results if applicable.

Common Clinical Scenarios

Patients presenting with skin manifestations of fungal infections.

Billing Considerations

Document the extent and location of lesions for accurate coding.

Coding Guidelines

Inclusion Criteria

Use B48 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the code is used when the specific mycosis is not classified elsewhere
  • Document the clinical findings, lab results, and treatment plans to support the use of this code

Exclusion Criteria

Do NOT use B48 When
No specific exclusions found.

Related Codes

Child Codes

6 codes
B48.0
Aspergillosis of lung
B48.1
Blastomycosis, unspecified
B48.2
Aspergillosis of lung
B48.3
Aspergillosis of lung
B48.4
Aspergillosis of lung
B48.8
Other specified mycoses

Related CPT Codes

87481CPT Code

Infectious agent detection by nucleic acid (DNA or RNA); fungal

Clinical Scenario

Used when confirming a fungal infection in a patient with symptoms.

Documentation Requirements

Document the reason for testing and any relevant clinical findings.

Specialty Considerations

Infectious disease specialists should ensure comprehensive documentation to support the necessity of the test.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more detailed coding of fungal infections, enabling better tracking of epidemiology and treatment outcomes. B48 provides a catch-all for mycoses that do not fit into specific categories, which can help in understanding the burden of these infections in various populations.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more detailed coding of fungal infections, enabling better tracking of epidemiology and treatment outcomes. B48 provides a catch-all for mycoses that do not fit into specific categories, which can help in understanding the burden of these infections in various populations.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more detailed coding of fungal infections, enabling better tracking of epidemiology and treatment outcomes. B48 provides a catch-all for mycoses that do not fit into specific categories, which can help in understanding the burden of these infections in various populations.

Resources

Clinical References

  • •
    CDC Fungal Diseases

Coding & Billing References

  • •
    CDC Fungal Diseases

Frequently Asked Questions

When should I use code B48?

Use code B48 when documenting fungal infections that do not fall under more specific mycosis codes, particularly in immunocompromised patients.