Other specified events, undetermined intent, sequela

This code signifies a long-term consequence or complication arising from an event where the intent (accidental, self-harm, or assault) could not be determined. It is used when the original event is not classifiable to a more specific external cause code and the patient is presenting for treatment of a residual condition.

Apply this code when a patient presents with a sequela (e.g., chronic pain, scar, functional impairment) directly attributable to a past event of unknown intent. This is appropriate for situations where medical records definitively state the intent could not be established, and the original injury occurred at some point in the past.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly states the intent of the original event was "undetermined" or "unspecified."
• Do not use for acute injuries; this code is exclusively for sequelae.