Poisn by unsp agents prim acting on the resp sys, acc, sqla

This code signifies the long-term or residual effects resulting from an accidental poisoning by an unknown substance that primarily affected the patient's respiratory system. These sequelae manifest after the acute phase of the poisoning has resolved, indicating persistent health issues directly attributable to the initial toxic exposure.

Apply this code when documenting chronic respiratory complications, such as persistent asthma, chronic bronchitis, or pulmonary fibrosis, that are definitively linked to a past, unintentional poisoning event where the specific toxic agent is not identified. This code is appropriate for follow-up encounters addressing these lasting effects, not for the initial acute poisoning episode.

• Always use this code as a secondary diagnosis, following a code for the specific sequela (e.g., J45.909 for asthma).
• Ensure documentation clearly states the accidental nature of the original poisoning and the causal link to the current respiratory condition.
• Only use this code when the specific agent is unknown; if the agent is identified, a more specific T-code for poisoning should be used with the appropriate seventh character.