Person inj wh brd/alit from a 3- or 4- wheeled ATV, sequela

This code signifies a long-term health condition or complication resulting from an injury sustained by an individual while getting on or off a three- or four-wheeled all-terrain vehicle. It indicates that the initial injury event has passed, but its lasting effects are still present and being treated. This could include chronic pain, limited mobility, or other persistent issues directly attributable to the original ATV boarding/alighting incident.

Apply this code when documenting follow-up care for a patient experiencing a sequela (late effect) of an injury that occurred specifically during the act of mounting or dismounting a 3- or 4-wheeled ATV. This is appropriate for conditions like post-traumatic arthritis, nerve damage, or chronic pain syndromes that developed as a direct consequence of such an injury. Do not use for acute injuries or for injuries sustained while operating the ATV.

• Always sequence the code for the specific sequela (e.g., chronic pain, fracture nonunion) first, followed by this external cause code.
• Ensure documentation clearly links the current condition to a past injury involving boarding/alighting from a 3- or 4-wheeled ATV.
• The "S" seventh character indicates a sequela, meaning it's used for complications or conditions that arise as a direct result of an initial injury, after the acute phase has passed.