Poisoning by chloramphenicol group, undetermined, sequela

This code signifies a long-term health problem or complication resulting from an exposure to a chloramphenicol-based medication, where the intent of the poisoning (e.g., accidental, intentional self-harm) cannot be determined. It indicates that the acute phase of the poisoning has passed, and the patient is now experiencing residual effects.

Apply this code when documenting a patient's current condition that is a direct consequence of a past chloramphenicol poisoning of unknown intent. This is appropriate for follow-up visits or when the sequela is the primary reason for the encounter, and the original poisoning event is no longer active.

• Always sequence this code after the code(s) for the specific sequela (e.g., aplastic anemia due to chloramphenicol).
• Ensure documentation clearly links the current condition to a past chloramphenicol poisoning.
• Only use the "S" (sequela) seventh character when the acute poisoning event has resolved and the patient is being treated for the residual effects.