Poisoning by unspecified anesthetic, undetermined, sequela

This code signifies a long-term or residual effect resulting from a poisoning event involving an anesthetic that could not be identified as a specific type. The intent of the poisoning (e.g., accidental, intentional self-harm, assault) also remains unknown. This code is used when the acute phase of the poisoning has passed, and the patient is now experiencing ongoing health problems directly attributable to the past exposure.

Use this code when documenting a sequela (e.g., chronic organ damage, neurological deficits, persistent pain) stemming from a past poisoning by an anesthetic where the specific agent was not documented or identified, and the intent of the poisoning was also not determined. This code is appropriate for follow-up encounters addressing these lasting effects, not for the initial acute poisoning episode.

• Always ensure documentation clearly links the current sequela to the past poisoning event.
• This code requires a seventh character "S" for sequela; do not use for acute poisoning.
• Avoid using this code if the specific anesthetic or the intent of the poisoning is known; more specific codes would then apply.