Poisoning by calcium-channel blockers, undetermined, subs

This code signifies a poisoning event involving calcium-channel blockers where the intent (e.g., accidental, intentional self-harm) cannot be determined. It is used when the patient is receiving active treatment for the toxic effects after the initial encounter.

Apply this code for patients admitted or seen for follow-up care of calcium-channel blocker poisoning when the intent is not documented or is unclear. This includes scenarios where the patient is still experiencing symptoms or complications from the poisoning and is undergoing ongoing management.

• Ensure the documentation clearly states "undetermined" intent for the poisoning.
• Verify this is a "subsequent encounter," meaning the patient is receiving care after the initial treatment phase.
• Always code the specific calcium-channel blocker if known, using a more specific code if available.