Poisn by unsp agents prim act on the resp sys, slf-hrm, subs

This code signifies a patient presenting for follow-up care related to an intentional self-harm event involving an unspecified substance that primarily affected their respiratory system. The initial poisoning event has already occurred, and the patient is now receiving ongoing management or evaluation for its lingering effects or complications.

Use this code when documenting subsequent encounters for patients who previously attempted suicide or intentionally harmed themselves using an unknown or unclassified respiratory agent. This includes follow-up visits for respiratory complications, mental health evaluations, or ongoing treatment related to the initial self-poisoning.

• Ensure the documentation clearly indicates the encounter is "subsequent" to the initial poisoning event.
• Verify that the substance involved is indeed unspecified and primarily affected the respiratory system.
• Always code the underlying mental health condition (e.g., depression, bipolar disorder) as an additional diagnosis.