To select outcomes of the Nursing Outcomes Classification (NOC) and develop operational definitions for their indicators in order to evaluate patients during smoking cessation.A consensus study among experts, involving eight nurses. A 100% consensus was required to select the outcomes. Operational definitions were developed based on the literature.Two outcomes were selected, Smoking Cessation Behavior (1625)-with nine indicators, and Substance Withdrawal Severity (2108)-with 11 indicators, for which we developed operational definitions.Consensus allowed the selection of NOC outcomes and indicators, which will allow us to evaluate patients during smoking cessation using a standardized classification.A standardized classification provides a more qualified evaluation of patients during smoking cessation.