A health professional who specializes in teaching people with diabetes how to optimally self-manage their diabetes. This might include assisting people with diabetes to modify lifestyle and adopt healthy self-care behaviors, training people with diabetes and caregivers to use diabetes devices, such as blood glucose meters, insulin pens and pumps, and continuous glucose monitors, teaching problem-solving strategies and skills to help people live healthy, active lifestyles, providing nutrition education, and working with other health care providers to help manage care.