Underdosing of antifungal antibiotics, sys used, subs

This code indicates that a patient is experiencing the adverse effects of receiving too little of an antifungal medication that is administered throughout the body (e.g., orally, intravenously). This underdosing is occurring during a follow-up visit or during the healing phase of the condition. It implies that the prescribed systemic antifungal treatment was insufficient, missed, or not taken as directed, leading to continued or worsening fungal infection.

Use this code when documenting a patient's follow-up care for a fungal infection where the systemic antifungal medication dosage was inadequate, leading to persistent symptoms or treatment failure. This applies to situations where the patient did not take the full prescribed dose, the dose was too low, or doses were missed, and the provider is addressing this issue in a subsequent encounter.

• Always sequence this code after the primary diagnosis for the fungal infection being treated.
• Ensure documentation clearly states "underdosing" and specifies a "subsequent encounter" for accurate code assignment.
• Do not use this code for initial encounters or for adverse effects of correctly dosed medication.