Toxic effect of carbon tetrachloride, undetermined, sequela

This code signifies a long-term health problem or residual condition resulting from a past exposure to carbon tetrachloride, where the intent of the exposure (e.g., accidental, intentional self-harm, assault) cannot be determined. It indicates that the acute phase of the poisoning has resolved, but the patient continues to experience lasting effects.

Apply this code when documentation clearly links a current chronic condition (e.g., liver cirrhosis, kidney damage, neurological deficits) to a previous, unclarified carbon tetrachloride exposure. This is appropriate for follow-up visits or when a patient presents with a sequela years after the initial incident.

• Always sequence this sequela code after the code for the specific residual condition it describes.
• Ensure the medical record explicitly states "undetermined" intent for the original exposure.
• Do not use this code for acute carbon tetrachloride poisoning; use the appropriate acute toxic effect code.