42°20′21″N 71°06′30″W﻿ / ﻿42.339101°N 71.108440°W﻿ / 42.339101; -71.108440
 Joslin Diabetes Center is the world's largest diabetes research center, diabetes clinic, and provider of diabetes education. It is located in the Longwood Medical and Academic Area in Boston, Massachusetts, United States.  Among the Harvard Medical School affiliated institutions, Joslin is unique in its sole focus on diabetes. Joslin has the world's largest team of board-certified physicians treating diabetes and its complications, as well as the largest staff of Certified Diabetes Educators anywhere in the world. Joslin also supports the world's largest diabetes research team with more than 40 faculty investigators and more than 300 researchers.
 Roberta Herman, M.D., is currently President and CEO of Joslin Diabetes Center.
 Joslin Clinic has helped revolutionize the diagnosis, treatment, and prevention of diabetes, most notably by improving the survival rate of babies born to women with diabetes, developing sight-saving laser surgery, devising treatments to reduce amputation, and uncovering ways to predict who will develop diabetes. It was named after Elliott P. Joslin, an American doctor and pioneer in the study of diabetes.
 Some notable historic milestones include:
 Some of the clinical programs at Joslin include:
 Beetham Eye Institute:  The Beetham uses advanced diagnostics, laser treatment, cataract and retinal surgery, vision rehabilitation, and novel therapies to help preserve the eyesight of diabetic patients.
 Adult Clinic Care Joslin has a reputation for pioneering care and support of pediatric patients with diabetes and their families.  The pediatric staff includes board-certified endocrinologists, pediatric diabetes nurse educators, pediatric nutritionists, child psychologists, a social worker, and a child life specialist.
 Pediatric Clinic Care Joslin has a reputation for pioneering care and support of pediatric patients with diabetes and their families.  The pediatric staff includes board-certified endocrinologists, pediatric diabetes nurse educators, pediatric nutritionists, child psychologists, a social worker, and a child life specialist.
 Multicultural Health Clinics:  In response to the fact that Latinos and Asian Americans develop diabetes at a much higher rate, Joslin established clinics for these patient populations. They offer culturally sensitive care and bilingual staff.
 Patient EducationJoslin has the largest staff of Certified Diabetes Educators anywhere in the world. Specialists work with patients one-on-one, or through a variety of programs and classes. Educators work as part of the diabetes care team to provide coordinated, sequenced learning activities.
 Nephrology Section: Joslin provides the educational, medical, and emotional support needed to manage all forms of kidney disease, which impacts a significant number of people with diabetes. The goal is to detect, delay, and potentially reverse the effects of diabetes on the kidneys as early as possible.
 Joslin also offers specialty programs in cardiovascular disease, mental health and counseling services, peripheral neuropathy, obesity, insulin pump therapy, diabetes and pregnancy, diabetes and aging, hypoglycemia, sexual function and disorders of the feet. 
 Joslin has a number of initiatives aimed at developing and providing culturally-competent diabetes education, such as the Latino Diabetes Initiative and the Asian American Diabetes Initiative.
 Many important improvements in diabetes care were developed at Joslin. These include recognition that tight blood glucose control can slow or prevent diabetes complications, creation of treatment protocols to enable women with diabetes to have healthy babies, the identification of markers for pre-diabetes, and pioneering laser surgery for diabetic eye disease. Joslin researchers have won awards and recognition from the National Academy of Sciences, the National Academy of Medicine, and the American Diabetes Association, among many others.