Poisoning by antiasthmatics, undetermined, initial encounter

This code signifies an adverse event resulting from an antiasthmatic medication, where the intent (e.g., accidental, intentional self-harm, assault) cannot be determined. The patient is in the acute phase of treatment for the poisoning.

Apply this code when a patient presents with symptoms of antiasthmatic overdose or adverse reaction, and the provider's documentation explicitly states that the intent of the poisoning is unknown or undetermined. This is used for the initial visit or encounter for this specific poisoning event.

• Ensure documentation clearly states "undetermined intent" for the poisoning.
• Always assign an additional code for the specific antiasthmatic drug if known (e.g., from the T36-T50 chapter).
• Remember the "A" seventh character indicates an initial encounter for this poisoning.