Toxic effect of thallium, intentional self-harm, subs encntr

This code signifies a patient presenting for follow-up care or treatment of adverse health effects resulting from the deliberate ingestion or exposure to thallium, with the intent to harm oneself. Thallium poisoning can manifest with neurological, gastrointestinal, and dermatological symptoms, among others.

Apply this code when documenting subsequent encounters for a patient who previously attempted suicide or self-harm using thallium. This includes visits for ongoing management of organ damage, neurological sequelae, or psychological support related to the poisoning event. It is not for the initial acute poisoning.

• Requires an external cause code (e.g., X60-X69 for intentional self-poisoning) to fully describe the circumstances.
• Do not use for accidental exposure or therapeutic misadventures; different T codes apply for those scenarios.
• Ensure documentation clearly indicates the intentional nature of the thallium exposure and that it is a subsequent encounter.