Inclusion Criteria:  Patients with Type 1 or 2 Diabetes Mellitus. Patients 18 years of age or older. Admitted for deceased donor renal transplant surgery, pancreas transplant surgery, heart transplant surgery, liver transplant surgery and lung transplant surgery. Anticipated minimum of 72h hospital stay. Patients on insulin therapy (IV, SQ) post-surgery.  Exclusion Criteria:  Active COVID-19 infection. Pregnant or lactating female. Altered Mental Status at the time of sensor placement (sensor will be placed once mental status will improve). Inability to provide informed consent. Patients taking more than 4 g of acetaminophen in 24 hours or more than 1 gm every 6 hours.  Patients with skin lesions at the application site that may interfere with placement of the sensor.  Patients with known allergy to medical grade adhesive.