21 Century Smoking

21 Century Smoking is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Smokers Information & Treatment Centers

North American Industry Classification System (NAICS) Categories:

• All Other Outpatient Care Centers > Substance Abuse Outpatient Clinics > Smokers Treatment Centers

Standard Industry Classification (SIC) Categories:

• Specialty Outpatient Facilities, Nec > Substance Abuse Outpatient Clinics > Smokers Treatment Centers