A method (1300) of administering insulin includes receiving subcutaneous information (216, 216a) for a patient (10) at data processing hardware (112, 132, 142, 192, 160) and executing a subcutaneous outpatient process (1800, 1800a, 1800b) for determining recommended insulin dosages (2310, 2402, 2404, 2406). The subcutaneous outpatient process includes obtaining blood glucose data of the patient from a glucometer (124), aggregating blood glucose measurements to determine a representative aggregate blood glucose measurement (2310, 2402, 2404, 2406) associated with at least one scheduled blood glucose time interval, and determining a next recommended insulin dosage (2310, 2402, 2404, 2406) for the patient based on the representative aggregate blood glucose measurement and the subcutaneous information. The method also includes transmitting the next recommended insulin dosage to a portable device (110a, 110b, 123a, 123b, 124) associated with the patient. The portable device displays the next recommended insulin dosage.
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