This case-sensitive code system http://hl7.org/fhir/us/cdmh/CodeSystem/pcornet-tobacco-type defines the following codes:

Code	Display	Definition
01	Smoked tobacco only	Type(s) of tobacco used is Smoked tobacco only.
02	Non-smoked tobacco only	Type(s) of tobacco used is Non-smoked tobacco only.
03	Use of both smoked and non-smoked tobacco products	Type(s) of tobacco used is Use of both smoked and non-smoked tobacco products.
04	None	Type(s) of tobacco used is None.
05	Use of smoked tobacco but no information about non-smoked tobacco use	Type(s) of tobacco used is Use of smoked tobacco but no information about non-smoked tobacco use.
NI	No information	Type(s) of tobacco used is No information.
UN	Unknown	Type(s) of tobacco used is Unknown.
OT	Other	Type(s) of tobacco used is Other.