**A Study Comparing Dexcom Continuous Glucose Monitoring to Point of Care Glucose Testing for Managing Type 1 Diabetes** This study looks at two ways to check blood sugar in people with Type 1 Diabetes (T1D) during hospital stays. The two methods are **Dexcom Continuous Glucose Monitoring (CGM)** and **Point of Care (POC) Glucose Testing**. CGM is a device that continuously checks blood sugar levels, while POC is a standard finger-prick test. Researchers want to see if CGM can better manage blood sugar and prevent low sugar events (hypoglycemia) compared to the usual POC testing. **Key Points:** - **Length of Study:** Participants will be involved for their entire hospital stay, which must be over 3 days. - **Treatment Provided:** Participants will use either CGM or POC testing during their stay to guide insulin therapy. - **Eligibility:** You must have T1D, use insulin, and have poorly controlled blood sugar. You cannot join if you've used CGM before or if you have other specific medical conditions. The study is important because it may help improve how hospitals manage T1D and reduce complications for patients.