Poisoning by calcium-channel blockers, undetermined, sequela

This code signifies a long-term or residual health problem resulting from a past poisoning event involving calcium-channel blockers, where the intent of the poisoning (accidental, intentional self-harm, assault) could not be determined. The patient is no longer in the acute phase of the poisoning but is experiencing lasting effects.

Apply this code when documenting chronic organ damage (e.g., cardiac, renal), neurological deficits, or other persistent health issues directly attributable to a previous calcium-channel blocker overdose of unknown intent. This code is appropriate for follow-up encounters addressing these sequelae, long after the initial poisoning event has resolved.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past calcium-channel blocker poisoning of undetermined intent.
• Do not use this code for acute poisoning events; use the appropriate acute poisoning code with the 7th character "A" (initial encounter).