This document summarizes a presentation on measuring outpatient healthcare use in the VA system. It discusses challenges in measurement, key VA outpatient databases, and strategies for evaluating different aspects of outpatient care such as procedures, provider specialty, and care over time. The Medical SAS outpatient datasets and DSS National Data Extract files are described as primary sources for measuring outpatient visits, procedures, and diagnoses. Examples are given of studies that measured intensity of care, care concomitant with inpatient stays, and trends in outpatient vs inpatient utilization over time.