Toxic effect of tobacco cigarettes, undetermined, sequela

This code signifies a long-term or residual health problem resulting from a past toxic exposure to tobacco cigarettes, where the intent of the exposure (e.g., accidental, intentional self-harm) is unknown or unspecified. It indicates that the acute phase of the toxic effect has passed, and the patient is now experiencing the lasting consequences.

This code is appropriate for documenting chronic conditions or permanent damage directly attributed to a prior tobacco cigarette toxicity, when the circumstances surrounding the original exposure are not documented. Examples include persistent respiratory issues, cardiovascular damage, or neurological deficits that are clearly linked to a past toxic event from tobacco, but the intent of that exposure is unclear.

• Requires a seventh character "S" to indicate sequela, meaning the residual effects of a past toxic event.
• Do not use for current or ongoing tobacco use or dependence; those have separate codes.
• Ensure documentation clearly links the current condition to a past toxic effect of tobacco cigarettes and specifies the undetermined intent.