Toxic effect of tobacco cigarettes, undetermined, subs

This code signifies a harmful physiological reaction to tobacco cigarettes where the intent (accidental vs. intentional self-harm) cannot be determined. It is used when a patient is receiving follow-up care for a condition or complication directly resulting from this toxic exposure.

Apply this code for subsequent encounters when a patient presents with ongoing symptoms or complications from a tobacco cigarette toxicity, and the documentation does not specify whether the exposure was accidental or intentional. Examples include follow-up for respiratory distress, cardiovascular issues, or neurological symptoms attributed to the toxic effect.

• Requires documentation clearly stating "undetermined" intent regarding the tobacco cigarette exposure.
• Only use for subsequent encounters; an initial encounter would use the "A" seventh character.
• Always sequence this code after the primary diagnosis related to the specific manifestation of the toxic effect.