Poisoning by expectorants, accidental (unintentional), subs

This code signifies an accidental overdose or adverse reaction to an expectorant medication, such as guaifenesin, during a follow-up visit for the initial poisoning event. The patient is experiencing ongoing effects or complications from the unintentional ingestion of an expectorant.

Apply this code when a patient presents for continued care, monitoring, or treatment related to an accidental expectorant poisoning that occurred previously. This includes scenarios where the patient is being seen for lingering symptoms, adverse effects, or management of complications arising from the initial unintentional exposure.

• Ensure the encounter is explicitly for follow-up care related to the initial poisoning, not the initial presentation.
• Verify documentation clearly states the poisoning was accidental (unintentional).
• Always sequence this code after the primary diagnosis for the specific manifestation of the poisoning, if applicable.