Poisoning by fentanyl or fentanyl analogs, assault, sequela

This code signifies the long-term effects or complications arising from a fentanyl or fentanyl analog poisoning that occurred as a result of an intentional act of harm by another person. It indicates that the acute poisoning event has passed, but the patient is still experiencing residual health problems directly attributable to that assault.

Use this code when documenting a patient presenting with chronic conditions, organ damage, neurological deficits, or other lasting sequelae directly linked to a past fentanyl poisoning that was inflicted during an assault. This code is appropriate for follow-up encounters after the initial acute poisoning has been treated and resolved.

• Always sequence this code after the code for the specific sequela (e.g., chronic respiratory failure, anoxic brain injury).
• Ensure documentation clearly links the current condition to the past fentanyl poisoning and specifies the assault as the intent.
• Do not use for acute poisoning events; those require codes from the initial encounter or subsequent encounter categories.