Poisoning by other specified systemic agents

This code signifies an adverse reaction or overdose due to systemic agents not otherwise classified, such as certain medications, chemicals, or biological substances. It represents a harmful effect resulting from the ingestion, absorption, or exposure to these specified substances.

Use this code when documentation clearly indicates poisoning by a systemic agent that falls outside more specific categories. This typically applies to substances like certain antineoplastic drugs, immunosuppressants, or other therapeutic agents not covered by more granular poisoning codes. Supporting documentation should specify the substance involved and the nature of the poisoning.

• Always identify the specific substance causing the poisoning when possible; this code is for "other specified" agents.
• Sequence this code first when it represents the primary reason for the encounter, followed by codes for any manifestations of the poisoning.
• Distinguish between poisoning (accidental or intentional overdose/adverse effect) and adverse effect in therapeutic use (E-codes are crucial for this distinction).