Poisoning by cannabis, undetermined, subsequent encounter

This code describes a patient experiencing adverse effects from cannabis use where the intent (e.g., accidental, intentional self-harm) cannot be determined. This specific code is used for encounters following the initial treatment of the poisoning, indicating ongoing care related to the event.

Apply this code when a patient presents for follow-up care, monitoring, or management of complications stemming from an undetermined cannabis poisoning. Examples include subsequent visits for persistent neurological symptoms, psychiatric evaluation, or organ system damage after the initial acute phase has passed.

• Always ensure the "D" seventh character is appropriate for a subsequent encounter, not an initial or sequela encounter.
• Pair this code with additional codes for specific manifestations or complications of the cannabis poisoning.
• Document clearly why the intent of the poisoning remains "undetermined" in the patient's medical record.