Poisoning by enzymes, undetermined, sequela

This code signifies a long-term health problem or residual effect resulting from a past poisoning by an enzyme, where the intent of the poisoning (accidental, intentional self-harm, assault) cannot be determined. The patient is no longer in the acute phase of the poisoning but is experiencing persistent symptoms or conditions directly attributable to the prior enzyme exposure.

Apply this code when documenting a chronic condition, disability, or other late effect directly linked to an enzyme poisoning event that occurred in the past. This is appropriate when the original poisoning's circumstances remain unknown or unspecifiable regarding intent. Use for follow-up care or management of sequelae once the acute poisoning has resolved.

• Always sequence this sequela code after the code(s) for the specific residual condition(s) being treated.
• Ensure documentation clearly links the current condition to a past enzyme poisoning and indicates undetermined intent.
• Do not use for acute poisoning; refer to the appropriate acute poisoning codes for initial encounters.