Provider- and staff-perceived levels of integration were measured during implementation of a primary care behavioral health clinic; these data were used to tailor and evaluate quality improvement strategies. Providers and staff at an urban, academic, adult primary care clinic completed the 32-item Level of Integration Measure (LIM) at baseline and 7 months. The LIM assesses 6 domains of integrated care. Overall and domain scores were calibrated from 0 to 100, with ≥80 representing a highly integrated clinic. Response rate was 79% (N = 46/58) at baseline and 83% (N = 52/63) at follow-up. Overall, LIM score increased from 64.5 to 70.1, P = .001. The lowest scoring domains at baseline were targeted for quality improvement and increased significantly: integrated clinical practice, 60.0 versus 68.4, P < .001; systems integration, 57.0 versus 63.8, P = .001; and training, 56.7 versus 65.3, P = .001. Ongoing quality improvement, including organizational and financial strategies, is needed to achieve higher levels of integration.