According to stakeholders’ program theory, physicians’ buy-in to HIV prevention also is an important issue for sustaining the program. The assessment of physicians’ buy-in to HIV prevention was based on the use of the mixed methods triangulation strategy. A quantitative assessment of physicians’ commitment was carried out by asking physicians to answer a standardized set of survey questions. A qualitative assessment of physicians’ commitment included the use of participant observations. Two project coordinators who worked with physicians on a day-to-day basis were asked to keep work diaries documenting physicians’ activities and recording their reactions toward the project. These diaries provided rich information on whether the physicians were cooperative or supportive of the intervention in their day-to-day activities. The preliminary qualitative and quantitative data consistently indicated that physicians delivered the prevention services, but their commitment to HIV prevention was not very high during the first six months of the project.