A method of administering insulin includes receiving subcutaneous information for a patient at a computing device and executing a subcutaneous outpatient program for determining recommended insulin dosages. The subcutaneous outpatient program includes obtaining glucose data of the patient, aggregating glucose measurements to determine a representative aggregate glucose measurement associated with at least one scheduled glucose time interval, and determining a next recommended insulin dosage for the patient based on the representative aggregate glucose measurement and the subcutaneous information. The method also includes transmitting the next recommended insulin dosage to administration device associated with the patient.