Poisoning by methadone, accidental (unintentional), subs

This code signifies a patient presenting for follow-up care or treatment of complications arising from an accidental overdose or unintended exposure to methadone. The initial poisoning event has already been addressed, and the current encounter focuses on ongoing management or sequelae.

Apply this code when a patient returns for continued monitoring, management of organ damage (e.g., respiratory depression, cardiac issues), or addressing withdrawal symptoms after an accidental methadone poisoning. It is appropriate for encounters occurring after the acute phase of the poisoning.

• Ensure the documentation clearly states the methadone poisoning was accidental and this is a subsequent encounter.
• Always sequence this code after any codes for the specific complications or manifestations of the poisoning.
• Do not use for initial treatment of the acute poisoning; refer to the appropriate initial encounter code.