Poisn by immune chkpt inhibtr/immunostim drugs,slf-hrm,init

This code signifies a patient presenting with adverse effects or toxicity resulting from the deliberate self-administration of immune checkpoint inhibitors or other immunostimulant medications. The intent behind the ingestion or administration of these drugs was to cause self-harm. This code is used for the initial phase of treatment for such an event.

Apply this code when a patient is admitted or first seen for an overdose or toxic reaction to an immune checkpoint inhibitor (e.g., pembrolizumab, nivolumab) or an immunostimulant drug, and medical documentation clearly indicates the act was intentional self-harm. This includes emergency department visits, initial hospitalizations, or the first outpatient encounter for this specific poisoning event.

• Always verify documentation explicitly states "intentional self-harm" or "suicide attempt" related to the drug.
• Requires an additional code for the specific immune checkpoint inhibitor or immunostimulant drug involved (e.g., from the T45.1-T45.9 range).
• Do not use for accidental poisonings or adverse effects from therapeutic use; different codes apply for those scenarios.