Poisoning by oth antidysrhy drugs, undetermined, sequela

This code signifies a long-term or residual effect resulting from a poisoning event involving non-specified antidysrhythmic medications, where the intent of the poisoning (accidental, intentional self-harm, assault, or undetermined) could not be established. The patient is no longer in the acute phase of the poisoning, but rather experiencing a lasting complication directly attributable to the past exposure.

Apply this code when documenting a chronic condition, organ damage, or other persistent health problem that is a direct consequence of a previous poisoning by an antidysrhythmic drug, and the original poisoning's intent was not determined. This is appropriate for follow-up encounters after the acute poisoning has resolved.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Do not use this code for acute poisoning events; those require codes from the initial encounter subcategories.
• Ensure documentation clearly links the current condition to a past undetermined poisoning by an antidysrhythmic agent.