Your learning journey with
Dexcom ONE
Follow these simple steps to discover what you need to know about setting up and using your Dexcom ONE real-time Continuous Glucose Monitoring (CGM) System.
Dexcom is here to support you on your journey with us, we’ll show you how to get the best out of your Dexcom ONE and where to find additional help and guidance.
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Continued support with Dexcom ONE

Once you set up your Dexcom ONE system, our support doesn’t end there. We offer ongoing education to help you get the best from your Dexcom experience.

How To Replace Your Transmitter When The Battery Life Has Ended (Around 90 Days)

A Dexcom ONE sensor on the abdomen

Managing your sensor adhesion

Everyone’s skin is different. Extra care may help you keep your sensor on for the entire sensor session. Here are tips some Dexcom customers have used successfully.
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Dexcom and travelling
Don’t be worried about travelling with your Dexcom system. We have compiled information into a handy FAQ.
  • Travel FAQs

Travelling Documents

Dexcom users may further enhance their experience at airport security by carrying a Medical Device Awareness (MDA) Card, approved by the UK civil aviation authority. In addition, we have also created a travel letter. Both can be downloaded below.

Further information on the Medical Device Awareness Card

Frequently Asked Questions

Q. How accurate is Dexcom ONE compared to a blood glucose meter?
Dexcom real-time CGM systems provide much more information for users than traditional Self-Monitoring of Blood Glucose (SMBG) does. For Dexcom ONE users, the expected level of accuracy is based on comparisons to fingerstick results — which require careful consideration of timing and technique consistency when drawing blood glucose values.
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Join the Warriors

We are fiercely proud of our Dexcom Warriors – a community of like-minded people living with diabetes. You can find out more and share your story too, by joining the programme.

You're almost there

If you’re ready, you can carry on and find out how to understand your diabetes patterns and trends using Dexcom Clarity.
This page is for supplementary purposes only, please refer to your IFU for complete instructions.
*For a list of compatible smart devices, visit

LBL-1000333 Rev003

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