Poisoning by propionic acid derivatives, undetermined, subs

This code signifies a poisoning event involving propionic acid derivatives, such as ibuprofen or naproxen, where the intent (accidental, intentional self-harm, assault) cannot be determined. The "subsequent encounter" indicates that the patient is receiving follow-up care for the sequelae or ongoing management of this poisoning, not the initial acute treatment.

Apply this code when a patient presents for ongoing treatment or monitoring related to a past poisoning by propionic acid derivatives, and the clinician cannot definitively ascertain the intent of the poisoning. This is appropriate for follow-up visits after the initial acute phase of care has concluded.

• Always sequence this code after the primary diagnosis indicating the specific manifestation of the poisoning (e.g., acute kidney injury, gastrointestinal hemorrhage).
• Ensure documentation clearly supports that the intent of the poisoning remains "undetermined" and that this is a follow-up visit.
• Do not use this code for the initial acute care encounter; an "A" (initial encounter) or "S" (sequela) character would be appropriate for those scenarios.