Poisoning by calcium-channel blockers, accidental, subs

This code signifies an accidental overdose or adverse reaction to a calcium-channel blocker medication during a follow-up visit. The patient is experiencing ongoing effects or complications from an unintentional exposure to this class of drugs.

Apply this code when a patient presents for continued management, monitoring, or treatment of symptoms stemming from an accidental calcium-channel blocker poisoning. This includes visits for electrolyte imbalances, cardiac rhythm disturbances, or other systemic effects after the initial acute care.

• Ensure the encounter is clearly documented as "subsequent" and not the initial treatment for the poisoning.
• Verify that the poisoning was accidental (unintentional) and not intentional self-harm or assault.
• Always code with an additional code for the specific manifestation of the poisoning, if applicable.