Frequently Asked Questions

Q: What is CGM:

A: Continuous Glucose Monitoring or as its now commonly referred to (CGM) is a revolutionary technology enabling people with Diabetes, or those just interested in their glucose readings, to take measurements at regular intervals.  Tracking Glucose 24 hours per day allows for tighter glucose control in those with Diabetes.

Q: What are the benefits of CGM

A: The benefits of CGM are widespread and vary by user.  The key benefits of a CGM system are it allows the user to proactively manage his/her glucose levels, mitigate high and lows more effectively, and gives additional insight into the effect of meals on blood sugar.  Additional benefits include better glucose control and management during exercise or illness.  Overall the American Diabetes Association has acknowledged that tight glucose control, coupled with a healthy diet can lower complications and risks associated with Diabetes.  Additionally, Studies have shown that some CGM systems may help reduce A1C levels[i] and risk for hypoglycemia, whether users inject insulin manually via pen or syringe, or use an insulin pump

Q: How does CGM Work:

A: Continuous Glucose Monitoring Systems track glucose levels throughout the day.  This is done by using a tiny sensor which is worn just beneath the skin.  The sensor is inserted using an automatic applicator.  The Freestyle Libre Insertor is virtually pain free and allows the user to insert the senor in just seconds, painlessly under the skin.  An adhesive patch helps secure the sensor to the skin so the senor remains in place during times of bathing or showering.  Additional products will be available soon by to help improve adhesion of the sensor during times of additional moisture, such as during exercise, bathing, or even summer days.  The Freestyle Libre comes with a reusable transmitter but can also work with your Android or Iphone Smart phone for tracking blood sugar throughout the day.  Both the transmitter and the app together with a simple touch to your sensor, provides instant real time blood sugar readings, along with an arrow indicating the direction your blood sugar reading is heading.  Custom Alerts can be set to enable better glucose control and warnings.

Q: How long does the FreeStyle Libre Sensor Last?

A: The Libre Sensor can be worn for up to 14 days

Q: Why does the FreeStyle Libre 14 day system require a 1-hour warm-up period? Are any readings available?

A: The 1-hour warm-up period allows your body to acclimate to the Libre Sensor and no readings are available. After the initial 1 hour warm-up period, you can immediately start receiving accurate glucose readings up to 14 days.

[1] 1 JAMA. 2017;317(4):371-378.

2 Welsh, J.B. et al (2019). “Accuracy, Utilization, and Effectiveness Comparisons of Different Continuous Glucose Monitoring Systems.”  Diabetes Technol Ther 21(3)


If you are not insured, or have a high deductible health insurance plan, you can still purchase the Freestyle Libre Reader and Sensors at extremely competitive prices. Prices starting as low as $99 per month

*Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol, when symptoms do not match system readings when you suspect readings may be in accurate, or when you experience symptoms that may be due to high or low blood glucose.

Reference 1: Data on file. Abbott Diabetes Care. 2, FreeStyle Libre 14 day User’s Manual

Indications and Important Safety Information

FreeStyle Libre and FreeStyle Libre 14 day Flash Glucose Monitoring systems are continuous glucose monitoring (CGM) devices indicated for replacing blood glucose testing and detecting trends and tracking patterns aiding in the detection of episodes of hyperglycemia and hypoglycemia, facilitating both acute and long-term therapy adjustments in persons (age 18 and older) with diabetes. The systems are intended for single patient use and require a prescription.

CONTRAINDICATIONS: Remove the sensor before MRI, CT scan, X-ray, or diathermy treatment.

WARNINGS/LIMITATIONS: Do not ignore symptoms that may be due to low or high blood glucose, hypoglycemic unawareness, or dehydration. Check sensor glucose readings with a blood glucose meter when Check Blood Glucose symbol appears, when symptoms do not match system readings, or when readings are suspected to be inaccurate. The system does not have alarms unless the sensor is scanned, and the system contains small parts that may be dangerous if swallowed. The system is not approved for pregnant women, persons on dialysis, or critically-ill population. Sensor placement is not approved for sites other than the back of the arm and standard precautions for transmission of blood borne pathogens should be taken. The built-in blood glucose meter is not for use on dehydrated, hypotensive, in shock, hyperglycemic-hyperosmolar state, with or without ketosis, neonates, critically-ill patients, or for diagnosis or screening of diabetes. When using FreeStyle LibreLink app, access to a blood glucose monitoring system is required as the app does not provide one. Review all product information before use or contact Abbott Toll Free (855-632-8658) or visit for detailed indications for use and safety information.html. . FreeStyle, Libre, and related brand marks are trademarks of Abbott Diabetes Care Inc. in various jurisdictions. Other trademarks are the property of their respective owners. ©2018 Abbott. ADC-09691 vLO 10/18

*The FreeStyle LibreLink app and the FreeStyle Libre 14 day reader have similar but not identical features. Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol, when symptoms do not match system readings, when you suspect readings may be inaccurate, or when you experience symptoms that may be due to high or low blood glucose.

The FreeStyle Libre 2 app and the FreeStyle Libre 2 reader have similar but not identical features. Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol and when your glucose alarms and readings from the system do not match symptoms or expectations

‡‡‡Based on the sensor being replaced once every 14 days, and scanned at least once every 8 hours.

§§§Glucose readings are not available during 1-hour warm-up, when sensor is too hot or too cold, when you see an error or "LO" or "HI" message, or no current glucose reading