# Using CGM for Insulin Dosing

**URL:** <https://forum.fudiabetes.org/t/using-cgm-for-insulin-dosing/2032>\
**Category:** C/GM\
**Tags:** medicare, fda\
**Created:** [September 17, 2017, 5:03pm UTC](https://forum.fudiabetes.org/t/using-cgm-for-insulin-dosing/2032 "2017-09-17T17:03:41Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![MaryPat](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/marypat/32/985_2.png) [@MaryPat](https://forum.fudiabetes.org/u/MaryPat)\
**Post date:** [September 18, 2017, 1:05am UTC](https://forum.fudiabetes.org/t/using-cgm-for-insulin-dosing/2032/13 "2017-09-18T01:05:01Z")

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> [@dave](#):
>
> For me, the G5 is crazy, crazy accurate.

@Dave, welcome to FUD! We have an Introduction Thread so people can find out about you, if you want:

> [@Welcome, introduce yourself here!](https://forum.fudiabetes.org/t/welcome-introduce-yourself-here/145):
>
> Hello, welcome to FUDiabetes (For Unlimited Diabetes). We’re happy to have you here and look forward to sharing, learning, and exploring all things diabetes together. I’m Sam, formerly known as Sam19. I live in Alaska with my wife and 2 young children. I was diagnosed with T1 unexpectedly at age 29. I currently manage with tresiba, novolog MDI, and Afrezza. I use a dexcom G5 cgm intermittently. Nice to meet you all.

Our G5 readings are, in general, accurate, when our calibration is good. We often dose from the CGM readings. But there are many circumstances when we will feel the need to manually test first. I agree with @CatLady when she writes:

> [@CatLady](#):
>
> the author overlooks the value of our experience with CGMs over time, i.e., that we learn to recognize odd, not-quite-readings and confirm accuracy with meters.\*

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