Inclusion Criteria:  Subject has diabetes Subject is ≥18 years of age Subject has a smartphone that is internet enabled Subject is able to comply with study protocol tasks and understand written and verbal instructions in the investigator's opinion Subjects is willing and able to provide written signed and dated informed consent  Exclusion Criteria:  Subject is critically ill or hospitalized  Prior use of CGM defined as:  No more than 1 week of continuous CGM use in the last 6 months, and At least 4 weeks of continuous use of CGM in the last 12 months or 12 weeks total use in the past 3 years. Subject has a known contraindication to dexamethasone or dexamethasone acetate Subjects requiring intravenous mannitol or mannitol irrigation solutions Subject is on dialysis at the time of enrollment Female subjects who are pregnant, planning on becoming pregnant or nursing