Poisoning by calcium-channel blockers, undetermined, init

This code signifies a patient presenting with adverse effects from calcium-channel blocker exposure where the intent (e.g., accidental, intentional self-harm) cannot be determined. The patient is receiving initial treatment for the poisoning event.

Apply this code when a patient is admitted or seen in the emergency department due to calcium-channel blocker toxicity, and the documentation does not specify whether the exposure was accidental, intentional, or assault. This code is appropriate for the first encounter for this specific poisoning episode.

• Always sequence this code first when it represents the primary reason for the encounter.
• Requires an additional code for the specific manifestation of the poisoning (e.g., bradycardia, hypotension).
• Only use the "A" seventh character for the initial encounter; subsequent care for the same poisoning would use "D" or "S".