Poisoning by 4-Aminophenol derivatives, assault, sequela

This code indicates a long-term health problem or complication resulting from an intentional poisoning by 4-aminophenol derivatives, such as acetaminophen. The initial acute effects of the poisoning have resolved, but the patient continues to experience residual damage or chronic conditions directly attributable to the assault.

Use this code when documenting a patient presenting with a sequela (e.g., chronic liver damage, kidney dysfunction, neurological deficits) that is definitively linked to a past assault involving 4-aminophenol derivatives. This code is appropriate for follow-up encounters after the acute phase of the poisoning has passed and the patient is being treated for the lasting effects.

• Always sequence this code after the code(s) for the specific sequela being treated (e.g., K74.60 for cirrhosis).
• Ensure documentation clearly establishes the causal link between the 4-aminophenol derivative poisoning (as an assault) and the current sequela.
• Do not use this code for the initial acute poisoning event; instead, use the appropriate acute poisoning code with the initial encounter seventh character.