It depends on the individual's health and type of diabetes, as well as, how ling the person has had diabetes.
In addition, the insurance company would consider how the diabetes is being managed, your health history and family health history, your height-to-weight ratio, if you smoke, and other risk factors.
Some insurers may offer no exam life insurance for diabetics with coverage available up to $300,000. However, there are some health questions to answer, and your rate for life insurance will cost more than life insurance that does require you to take a physical examination.
However, it is possible for diabetics to qualify for no physical exam life insurance coverage.