The purpose of this study is to assess the impact of a group-based program on glucose control for adults with diabetes. Ninety-two adults completed the program aimed at identifying and overcoming barriers to diabetes self-management with the use of behavioral strategies. A comparison group consisted of 275 adults with diabetes not participating in the program matched for age, gender, type of insurance coverage, and initial hemoglobin Alc (HbAlc) result. Members completing the program demonstrated significant improvements in HbAlc results at both the first and second postgroup measurements. Regression analyses identified initial HbAlc result and the interaction of condition and initial HbAlc as significant predictors of improvement in HbAlc. The quality of diabetes care and treatment outcomes can be enhanced with the inclusion of a low-cost, structured program led by a behavioral health professional.