Inclusion Criteria:  Age 19-80 Diagnosed with type 2 diabetes mellitus (DM) Uncontrolled type 2 DM: HbA1c 7.0-10.0% Signed informed consent  Exclusion Criteria:  Diagnosed with other types of diabetes mellitus (i.e. Type 1 DM) Use of prandial insulin Change in diabetes medication in the preceding 3 months Pregnant/lactating women Addiction to drugs and alcohol Use of medications that result in drug-induced hyperglycemia (i.e. steroid) Severe liver disease End-stage renal disease (i.e. on dialysis) Unable to wear CGM devices due to dermatologic side effects (i.e. severe burn, inflammation, active skin infection, severe skin reactions, hypertrichosis, etc.) Conditions that impact the stability of HbA1c measurement