Product Frequently Asked Questions

We’ve gathered together answers to some of the most common questions. Please check to see if the answer to your question can be found here. If you still have questions, our Customer Service team would be happy to help. You can use the search box to answer your question or browse the list of topics below.

Getting Started

What are the Dexcom ONE system components?
How do I create a Dexcom user account?
How do I set up my Dexcom ONE app?
Where do I insert my Dexcom ONE sensor?
How do I insert my Dexcom ONE sensor?
How do I find my sensor readings and glucose trend screen in my app?
How do I set up and use Dexcom ONE alerts?
Is it painful to insert a Dexcom ONE sensor?
What is a sensor code and why do I need one?
I lost my Dexcom ONE sensor code. What do I do?
What happens if my sensor insertion causes bleeding?