The study is a hospital based, prospective, longitudinal , observational study which will be conducted without any intervention. Data for this registry will be collected at 7 sites identified by BIRAC across India. The data of patients visiting the Out Patient Departments (OPD) of the hospital of all the collaborating sites who are known case of Diabetes Mellitus will be assessed for eligibility, consecutively invited to enroll for the study after obtaining their informed consent or assent form (if applicable)/ Re consent form already enrolled participants. Thereafter are being followed up after a minimum period of 3 months from the date of enrollment. No additional mandatory follow-up visits, nor interventions will happen. 

The aim of the study is to develop a Diabetes Mellitus Registry to facilitate recruitment for clinical trials pertaining to Diabetes Mellitus by matching potential subjects interested in participating in clinical research. The primary objective of this registry is to collect data on the demographics, anthropometry, and management of patients with Diabetes Mellitus that can be used to improve the knowledge of epidemiology clinical presentation, management, and complications of Diabetes Mellitus in India.