CGM devices
| Real-time CGM | CGM systems that measure glucose levels continuously and provide the user automated alarms and alerts at specific glucose levels and/or for changing glucose levels. |
| Intermittently scanned CGM | CGM systems that measure glucose levels continuously but only display glucose values when swiped by a reader or a smart phone that reveals the glucose levels. |
| Blinded (professional) CGM | CGM devices that measure glucose levels that are not displayed to the patient in real time. These devices are generally initiated in a clinic, using a reader that is owned by the clinic. They are removed after a period of time (generally 10–14 days) and analyzed by the patient and provider to assess glycemic patterns and trends. |
| Unblinded CGM | CGM devices that measure glucose levels that are displayed to the patient. |