This measure evaluates the extent primary care physicians (PCPs) perform care-based and procedural-based services core to primary care (licensure ensures competence of these services). For each PCP, the resulting value reflects an average of the weighted proportion of services within each category performed during the measurement period. Scores are based on weighted averages of 19 care-based and 20 procedural-based core primary care services resulting in scores between 0 and 100. Inclusion criteria: Primary care physicians who have provided care to 30 or more patients regardless of age within the measurement period (the performance year and the 12 months prior to the performance year).See Figure 1: Physician and Care Site Identifier in the Measure Specification Figures and Tables document under the Additional Supporting Documentation section for the variables used to determine if physicians meet the inclusion criteria (Step 1 and 2 of the Measure Calculation Algorithm (also found in the Measure Specification Figures and Tables document). Throughout this application, since the fields do not accept scientific formulas, tables or figures, we have attached those items in the Additional Supporting Documentation section.