Opportunistic mycoses

This code represents a group of fungal infections that primarily affect individuals with compromised immune systems. These mycoses are caused by organisms that are typically harmless in healthy individuals but become pathogenic when host defenses are weakened. Examples include candidiasis, aspergillosis, cryptococcosis, and pneumocystosis, among others.

Use this code when documentation clearly indicates a fungal infection occurring in a patient with an underlying immunodeficiency, such as HIV/AIDS, organ transplant recipients on immunosuppressants, or patients undergoing chemotherapy. The medical record should specify the type of opportunistic mycosis and the patient's immunocompromised status.

• Always code the underlying immunocompromised condition first, followed by this code for the opportunistic mycosis.
• Be specific; if the documentation identifies a specific opportunistic mycosis (e.g., candidiasis, aspergillosis), use the more precise ICD-9-CM code for that condition if available, rather than this general category.
• Avoid using this code for superficial fungal infections in otherwise healthy individuals; those would typically fall under codes like 110-111.