Toxic effect of smoke, undetermined, sequela

This code signifies a long-term or residual health problem resulting from exposure to smoke, where the intent of the exposure (accidental, intentional self-harm, assault) cannot be determined. It indicates that the acute phase of the smoke exposure has passed, but lasting effects persist.

Apply this code when a patient presents with a chronic condition, such as persistent respiratory issues, neurological damage, or other lasting sequelae, directly attributable to a past smoke exposure. The medical record must clearly indicate that the intent of the smoke exposure was not specified or could not be ascertained.

• Always assign a sequela code (ending in 'S') for conditions that are residual effects of a past injury or poisoning.
• Ensure documentation explicitly states the smoke exposure as the cause of the current chronic condition and that the intent is undetermined.
• Do not use this code for acute smoke inhalation; use the appropriate acute toxic effect code instead.