The purpose of this study is to create a large repository of blood samples and data from people with new-onset hyperglycemia and diabetes. A repository is a collection of samples from many different people that facilitates research. The study focuses on adults (50-85 years old) who have recently had one or more blood tests that indicate they may have hyperglycemia and/or diabetes. The blood samples to be stored are similar to those that patients provide during usual care with their doctors. Researchers cannot yet tell the difference between routine, new-onset hyperglycemia and diabetes and the very few people (less than 1%) who have new-onset diabetes related to cancer. The study aims to find a way to do this by measuring promising markers (indicators) from participants' blood samples.