Yes, a disbetic person can also get a term plan. But it is advisable that one should disclose his condition to his insurance company at the time of availing a term plan. And, based on the severity level of your diabetic condition, your term insurance premium is decided. However, in case you have additional health risks apart diabetic such as obesity, hypertension, or coronary heart illness, there are chances many insurance companies might reject you to avail insurance for a long term.