Adverse effect of anthelminthics, subsequent encounter

This code signifies an undesirable or harmful reaction experienced by a patient due to the therapeutic use of an anthelminthic medication, specifically when the patient is receiving follow-up care for this adverse effect. It indicates that the initial treatment of the adverse effect has already occurred, and the patient is now in a recovery or monitoring phase.

Apply this code when a patient presents for ongoing management, monitoring, or evaluation of an adverse effect from an anthelminthic drug, after the initial acute phase of treatment has passed. This includes follow-up appointments to assess the resolution of symptoms, manage lingering side effects, or monitor for long-term complications.

• Always sequence this code after the code for the specific adverse effect (e.g., rash, nausea).
• Ensure documentation clearly indicates the adverse effect is due to an anthelminthic and that it's a subsequent encounter.
• Do not use for initial treatment of the adverse effect; refer to the "A" (initial encounter) or "D" (subsequent encounter) seventh character for that.