The workshop discussions focused on options for expanding SAMHSA's behavioral health data collections to include measures of specific mental illness diagnoses with functional impairment and explored new measures and efficient mechanisms for collecting the data. Possibilities included adding new measures to existing surveys, initiating new data collections, or implementing model-based estimation procedures that take advantage of existing data sources, in the event that primary data collection methods are cost-prohibitive or not necessary. Survey and questionnaire design tradeoffs, as well as the potential impact of any changes to existing surveys.