Figure 2.

Frequency of Current Procedural Terminology (CPT) co-documentation with tobacco use codes. Each point represents a single CPT code. Points to the right of the equal documentation line (indicated in white) have an increased frequency of co-documentation with an International Classification of Diseases, Ninth Revision tobacco use code (eg, 300 more individuals had their code documented on the same day than those whose code was documented on different days). Points to the left of the center line have a reduced frequency of co-documentation with tobacco use codes.