Toxic effect of contact w oth venomous plant, undet, sequela

This code signifies a long-term or late-occurring health problem resulting from exposure to a venomous plant not otherwise specified, where the intent of the exposure (accidental, intentional self-harm, assault, undetermined) is unknown. It indicates that the initial toxic effect has resolved, but a residual condition persists.

Assign this code when a patient presents with a chronic or permanent sequela directly attributable to a past, unspecified venomous plant contact. This is appropriate when the initial acute toxic event has passed, and the current encounter addresses a lasting consequence, such as chronic dermatitis, scarring, or nerve damage.

• Requires a seventh character "S" to indicate sequela, meaning the residual effect of a previous injury or illness.
• Do not use for acute toxic effects; those require codes with A (initial) or D (subsequent) seventh characters.
• Always code the specific sequela (e.g., chronic dermatitis, scar) first, followed by this code as a secondary diagnosis to indicate its etiology.