Aim: Community-based research in order to evaluate the sensitivity and specificity of the Indian Diabetes Risk Score among the urban population of Patna, Bihar. Material and Methods: This community-based cross-sectional study was conducted among the urban population of Patna, Bihar, targeting adults aged 20 years or older. The study area is a field practice site for the Department of Community Medicine. A total of 200 participants were included in the study. A house-to-house survey was conducted, and face-to-face interviews were performed using a predesigned questionnaire based on the Indian Diabetes Risk Score (IDRS) variables . Households were selected using systematic random sampling, with every 3rd house chosen from approximately 1000 houses. The first house was selected randomly, and one subject from every 3rd house was included until the desired sample size was reached. Measures were taken to avoid duplication.Data were collected using a structured questionnaire that included demographic details, IDRS parameters, and medical history. The IDRS includes four simple parameters: age, waist circumference, family history of diabetes, and physical activity. Results: Participants were categorized based on their Indian Diabetes Risk Score (IDRS), which assesses the risk of developing diabetes. The results indicated that 30% (n=60) of participants were in the low-risk category with an IDRS score of <30. A significant portion, 45% (n=90), fell into the moderate-risk category with scores ranging from 30 to 59. Meanwhile, 25% (n=50) of the participants were classified as high risk with an IDRS score of ≥60. The findings revealed that 20% (n=40) of the participants were diabetic, while the remaining 80% (n=160) were non-diabetic. These results underscore the need for effective screening and management strategies for diabetes in the community.The effectiveness of the IDRS in predicting diabetes was evaluated by calculating its sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). The IDRS demonstrated a high sensitivity of 85% (95% CI: 73%-93%), indicating its ability to correctly identify individuals with diabetes. The specificity was 75% (95% CI: 68%-81%), reflecting the score's capability to correctly identify non-diabetic individuals. The PPV was 70% (95% CI: 58%-80%), and the NPV was 88% (95% CI: 81%-93%), highlighting the overall accuracy of the IDRS in the studied population. Conclusion: The Indian Diabetes Risk Score (IDRS) is an effective screening tool for identifying individuals at risk for diabetes in the urban population of Patna, Bihar. The study highlights the importance of community-based screening and early detection to manage and prevent diabetes effectively.