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Dexcom Users

For users of a Dexcom Continuous Glucose Monitoring ("CGM") device

Just as a reminder with the recent release of the new Dexcom G4 to the US market--it is NOT okay to post about previous models or older sensors as being 'for sale' on this site.

It is a violation of the Terms of Use because it is a prescription device, and any such efforts will unfortunately be removed.

We encourage you to donate supplies to non-profits such as the Charles Ray III Diabetes Association (, which accepts unexpired glucometer and insulin pump supplies, or alternatively you may talk to your physician's office or other local medical group to discuss donating them to those in need of assistance.

Thank you all for kindly refraining from this activity.

Members: 1656
Latest Activity: 15 hours ago


Dexcom-specific links

Forum conversations about Dexcom

Blogs entries about Dexcom

Videos about Dexcom

Rich demos insertion of a G4 sensor- video

CGM-specific links

Members who use CGM

Forum conversations about CGM

Blog entries about CGM

Videos about CGM

Diabetes Forum

formr nav users any luck?

Started by peruvianpasohi. Last reply by Jeffythequick 18 hours ago. 11 Replies

Planning to try an arm site!

Started by Elena. Last reply by Ned yesterday. 35 Replies

Can you calibrate to much?

Started by Sally. Last reply by niccolo yesterday. 16 Replies

Dexcom share?

Started by Alyssa. Last reply by mikep on Thursday. 5 Replies

Sensor Placements

Started by Denise. Last reply by PeggyEllen Apr 12. 24 Replies

Freestyle Libre CGM

Started by Linny. Last reply by Terry Apr 3. 15 Replies

How to make sensor last longer?

Started by catluvr. Last reply by FatCatAnna Apr 1. 13 Replies

Could my transmitter be bad?

Started by Susan Van Abs. Last reply by Susan Van Abs Mar 31. 10 Replies

Dexcom share Canada

Started by dishers. Last reply by FatCatAnna Mar 22. 5 Replies

2 calibrations, or one?

Started by Lawdawgz. Last reply by Seth Mar 22. 13 Replies

New Dexcom wearer

Started by dalajosa. Last reply by Terry Mar 21. 13 Replies

Calibration Issues

Started by Denise. Last reply by CC Mar 20. 4 Replies

Possible adhesive allergy

Started by Susan Van Abs. Last reply by Susan Van Abs Mar 20. 13 Replies

Actual Life of the G4 Receiver

Started by Bob Martin. Last reply by ChrisG Mar 17. 18 Replies

Comment Wall


You need to be a member of Dexcom Users to add comments!

Comment by john on December 20, 2011 at 7:41pm

Thanks for all the feedback. I really appreciate it. I had called Dexcom Support but got the impression that it must have been something I was doing wrong. But, it looks like that was a load of rubbish. The dexcom rep also told me that the demo unit was an older unit, and may have been nearing the end of its' life? Which I find questionable, as it was a demo, presumably intended to exhibit its desireability??
From this I deduce that the dexcom is somewhat of a general guide, but is not a dependable item at this point in its' evolution.
It was worth a try thought, I learned a lot. Thanks to all who gave me their input.

Comment by metheniac on December 20, 2011 at 5:47pm
I find that the Dex is pretty accurate most of the time, although I also have had some pretty weird numbers! They are rare. When I used the Medtronic CGM, it was rare that my numbers were even close to accurate. My endo suggested the Dex, because in her experience "some bodies chemistry work better with the Dex, and some work better with Medtronic.
Comment by kae on December 20, 2011 at 5:31pm

As much as I love my Dex, I wish that it was more trustworthy! Have had it for about a month, and can't imagine being without it. But, I did have a steady 120 reading on Dex and did a fingerstick - 42! Did a double take because I couldn't believe or feel it and came up with 45 again on a fingerstick.

Comment by MikeO on December 20, 2011 at 3:39pm

Hi - Did you take Tylenol? That will do it. Something in the chemicals throws off the CGM.

Comment by MikeO on December 20, 2011 at 3:37pm

Comment by lisa c on December 20, 2011 at 3:37pm

Sometimes the Dex is right on the mark... and other times it is so off. The main thing is to not believe it when correction bolus or when treating lows. I have gotten lazy and ties and believed the middle of night alarms, only to wake up in bad shape.Hopefully , they will get better with time.

Comment by lisa c on December 20, 2011 at 3:33pm

Comment by Denys on December 20, 2011 at 2:44pm

Me also had a higher reading than I test on my fingers. In the night my CGM vibrated and showed that it is 370, but I checked my sugar it was 140.

Comment by Jennifer on December 20, 2011 at 9:08am

Does anyone have a higher reading than when you test on your fingers? Mine is away off. This morning it read over 300 and I checked my sugar and it was 160.

Comment by Natasha Bowlds on December 14, 2011 at 10:33am

It's just Tricare Prime - I was just responding to Sandy about that. Unfortunately I don't think it's related to your issue of Medicare coverage. The people I know on Medicare with type 1 also pay out of pocket for the Dexcom. sorry.


Members (1656)




From the Diabetes Hands Foundation blog...

DHF Joins Diabetes Advocacy Alliance

Diabetes Hands Foundation is incredibly honored to join the Diabetes Advocacy Alliance, an organization with the drive and potential to affect a powerful, positive impact on diabetes and healthcare policy. Diabetes Advocacy Alliance is a 20-member coalition of leading professional Read on! →

Helmsley Charitable Trust Renews Support for DHF

HELMSLEY CHARITABLE TRUST GRANTS SUPPORT TO DIABETES HANDS FOUNDATION FOR FOURTH YEAR  Funding in 2015 to support major transitions in programs and leadership at Diabetes Hands Foundation BERKELEY, CA: February 18, 2015 – The Leona M. and Harry B. Helmsley Read on! →

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Melissa Lee
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Manny Hernandez
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Mike Lawson
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Corinna Cornejo
(Director of Operations and Development, has type 2)

Desiree Johnson  (Administrative and Programs Assistant, has type 1)


Lead Administrator

Brian (bsc) (has type 2)


Lorraine (mother of type 1)
Marie B (has type 1)

DanP (has Type 1)

Gary (has type 2)

David (has type 2)


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