Objectives: Diabetes mellitus (Type 2) has been an emerging public health problem in India. Lifestyle related risk factors play an important role in the development of diabetes and its related complications. Therefore, a study has been taken up with an__ampersandsignnbsp;objective to assess the effect of health intervention on glycemic status of diabetics. Methods and material: A descriptive epidemiological interventional study conducted over a period of three months at urban health centres of Deccan College of Medical Sciences, Hyderabad. During this study a health intervention on lifestyle modifications was given and its impact was assessed on the fasting blood glucose levels of already known patients of Diabetes Mellitus. Statistical analysis: Data was entered in Microsoft excel 2007 and interpreted by using SPSS 20. Mean, percentages and paired t test applied wherever appropriate. Results: A total of 104 diabetic patients were enrolled in our study. Majority of them were females (71.15%), belonging to upper lower socioeconomic status according to BG Prasad s classification. Family history of diabetes mellitus was found among 76.42% with higher body mass index and about 72.12% adopted sedentary type of lifestyle. There was a significant improvement in lifestyle and self care practices of the diabetic patients after health intervention. The mean fasting blood sugar level in__ampersandsignnbsp;pre intervention phase was 177.29 __ampersandsignplusmn; 72.01 mg/dl. Post intervention, this decreased to 133.29 __ampersandsignplusmn; 36.81 mg/dl which is statistically significant. Conclusions: Diabetic patients have to be educated about various risk factors causing diabetes and their modification measures by simple effective strategies to reduce the blood glucose level which has got a greater impact on further development of complications associated with type 2 diabetes mellitus.