Poisn by centr-acting/adren-neurn-block agnt, undet, subs

This code signifies a poisoning event involving centrally-acting or adrenergic-neuron-blocking agents where the intent (e.g., accidental, intentional self-harm) cannot be determined. The patient is in the recovery phase of the poisoning, receiving follow-up care, or experiencing residual effects.

Apply this code when a patient presents for ongoing management of symptoms or complications from an undetermined poisoning by these specific drug classes, after the initial acute treatment. This includes follow-up appointments for monitoring organ function, managing chronic side effects, or addressing psychological sequelae.

• Ensure the documentation clearly states that the intent of the poisoning is "undetermined" to justify this specific intent character.
• The "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Always code the specific substance(s) involved, if known, using additional external cause codes (T36-T50) to provide maximum specificity.