The procedural and diagnosis codes to be used are as follows: HCPCS/CPT Codes 99406 : Intermediate, Smoking and tobacco use cessation counseling visit is greater than three minutes, but not more than 10 minutes 99407 : Intensive, Smoking and tobacco use cessation counseling visit is greater than 10 minutes ICD-9 305.1 : Tobacco use disorder 649.0x : Tobacco use disorder complicating pregnancy, childbirth, or peurperium 989.84 : Toxic effect of tobacco ICD-10 F17.200 : Nicotine dependence, unspecified, uncomplicated F17.201 : Nicotine dependence, unspecified, in remission F17.210 : Nicotine dependence, cigarettes, uncomplicated F17.211 : Nicotine dependence, cigarettes, in remission F17.220 : Nicotine dependence, chewing tobacco, uncomplicated F17.221 : Nicotine dependence, chewing tobacco, in remission F17.290 : Nicotine dependence, other tobacco product, uncomplicated F17.291 : Nicotine dependence, other tobacco product, in remission Asymptomatic Patients Asymptomatic patients are tobacco users with no symptoms of tobacco-related disease

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Exposure to these aerosols can occur through inhalation, contact, or ingestion of the residue left on surfaces
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However, your body absorbs much lessaround 1-2mg of nicotine per cigarette due to combustion and smoke loss