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    • 6 hours, 53 minutes ago
      NANCY NECIA likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      My doctor switched me without telling me from Humalog to novolog and told me it was due to insurance. I’m on Medicare and I never saw anything that said that was necessary. They call me periodically to see how I’m doing and I told them I didn’t appreciate being switched without being told. I thought initially it was a mistake when I picked it up at the pharmacy but they said that’s what the doctor ordered. Then the next visit, he told me all my issues with insulin switching and preauthorization holdups was my fault basically because he says “I have the wrong insurance”. Like I’m going to NOT use Medicare. My opinion? I think I have the wrong doctor, but it’s a hassle to switch.
    • 6 hours, 54 minutes ago
      NANCY NECIA likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      Not this year, but in 2026, I need to switch from Humalog to Novolog.
    • 9 hours, 24 minutes ago
      mojoseje likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      NEVER accerptable or appropriate. Nobody's healthcare should ever be determined by a third party's profit margin(s) to determine what we are forced to take.
    • 11 hours, 27 minutes ago
      Phyllis Biederman likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      My doctor switched me without telling me from Humalog to novolog and told me it was due to insurance. I’m on Medicare and I never saw anything that said that was necessary. They call me periodically to see how I’m doing and I told them I didn’t appreciate being switched without being told. I thought initially it was a mistake when I picked it up at the pharmacy but they said that’s what the doctor ordered. Then the next visit, he told me all my issues with insulin switching and preauthorization holdups was my fault basically because he says “I have the wrong insurance”. Like I’m going to NOT use Medicare. My opinion? I think I have the wrong doctor, but it’s a hassle to switch.
    • 11 hours, 45 minutes ago
      Lawrence S. likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Insurance won't cover and it was several hundred dollars.
    • 11 hours, 46 minutes ago
      Marty likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      Had to, no. But Medicare is adding coverage for FIASP in '26 so it will be "bye, bye, bye, bye, bye" to Lyumjev!
    • 12 hours, 37 minutes ago
      Gerald Oefelein likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      Had to, no. But Medicare is adding coverage for FIASP in '26 so it will be "bye, bye, bye, bye, bye" to Lyumjev!
    • 12 hours, 52 minutes ago
      Scott Rudolph likes your comment at
      Have you had to switch diabetes medications in the past year due to health insurance changes?
      Had to, no. But Medicare is adding coverage for FIASP in '26 so it will be "bye, bye, bye, bye, bye" to Lyumjev!
    • 1 day, 9 hours ago
      eherban1 likes your comment at
      Multiple daily injections (MDI) users: Do you use an app or other device to track your insulin dosing? Share the tools you use in the comments below!
      I use InPen and it's great. Except they aren't keeping up with iOS so you now have to unlock your phone and open the app to check IOB instead of simply looking at the home screen. You can tell when app developers aren't users, otherwise they'd know how much of a pain this is when you check 50 times a day
    • 1 day, 10 hours ago
      Trish Bowers likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Insurance won't cover and it was several hundred dollars.
    • 1 day, 10 hours ago
      Trish Bowers likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Glucagon is $425 for me on Medicare. It is cheaper to get an ambulance! I have an expired one that will work if I ever need it, but I won't.
    • 1 day, 10 hours ago
      Trish Bowers likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      No. During the past century I threw out many glucagon doses about 5 years after each had expired - having never used a single glucagon dose.. This century, two dose kits were disposed of and never used. At this point, in my opinion, with modern tools for accurately monitoring one's body glucose levels, AND common awareness of how one is feeling, severe low BGL can be easily avoided thus not needing "emergency' glucagon. NOTE WELL!!! what I wrote in the last sentence, does NOT apply to the very young, and some newly diagnosed who have not yet mastered insulin dosing and who have not yet been accustomed to recognizing low or quickly dropping BGL.
    • 1 day, 10 hours ago
      Trish Bowers likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      I do because it Costc me over $300 to replace it. Too expensive.
    • 1 day, 11 hours ago
      John Barbuto likes your comment at
      Multiple daily injections (MDI) users: Do you use an app or other device to track your insulin dosing? Share the tools you use in the comments below!
      Medicare has added FIASP for 2026! Besides the great news of being able to use this once again, it is one of the few fast acting insulins that works with the inPen. I am considering doing that in the new year
    • 1 day, 11 hours ago
      John Barbuto likes your comment at
      Multiple daily injections (MDI) users: Do you use an app or other device to track your insulin dosing? Share the tools you use in the comments below!
      Been using fiasp for 2 years (in the UK) and it's significantly better than novorapid. Would highly recommend to everyone, especially if you find your insulin a bit slow to act.
    • 1 day, 11 hours ago
      Lozzy E likes your comment at
      Multiple daily injections (MDI) users: Do you use an app or other device to track your insulin dosing? Share the tools you use in the comments below!
      Medicare has added FIASP for 2026! Besides the great news of being able to use this once again, it is one of the few fast acting insulins that works with the inPen. I am considering doing that in the new year
    • 1 day, 15 hours ago
      Ahh Life likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      The last Glucagon prescription that I purchased was 15 years ago. Now it's way too expensive because my insurance doesn't cover it. They just want us to either die or use ambulance service to use or send us to ER. Pretty stupid to me. I've had T1D for 52 years and never needed it really. Only 3 times during early morning hypos in 2015-16 I needed rescue to wake me.
    • 1 day, 20 hours ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      My experience over the past 65 years is that a sugary drink and patience will bring me out of a low satisfactorily. If I’m unconscious, as has happened four or five times over that period, the EMTs know what to do.
    • 1 day, 20 hours ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Glucagon is $425 for me on Medicare. It is cheaper to get an ambulance! I have an expired one that will work if I ever need it, but I won't.
    • 1 day, 20 hours ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      No I haven't a glucagon in yeans. Reason being:, every time I had a prescription, the glucaagon was never used and expired.
    • 1 day, 20 hours ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      No. During the past century I threw out many glucagon doses about 5 years after each had expired - having never used a single glucagon dose.. This century, two dose kits were disposed of and never used. At this point, in my opinion, with modern tools for accurately monitoring one's body glucose levels, AND common awareness of how one is feeling, severe low BGL can be easily avoided thus not needing "emergency' glucagon. NOTE WELL!!! what I wrote in the last sentence, does NOT apply to the very young, and some newly diagnosed who have not yet mastered insulin dosing and who have not yet been accustomed to recognizing low or quickly dropping BGL.
    • 1 day, 20 hours ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      I do because it Costc me over $300 to replace it. Too expensive.
    • 1 day, 20 hours ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Insurance won't cover and it was several hundred dollars.
    • 1 day, 20 hours ago
      René Wagner likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      No,insurance won't cover it. T1D for 45+ years and haven't had a situation where I needed it - so far so good
    • 1 day, 23 hours ago
      Vicki Breckenridge likes your comment at
      Do you have Glucagon on hand that is not expired? If not, please share why in the comments.
      Glucagon is $425 for me on Medicare. It is cheaper to get an ambulance! I have an expired one that will work if I ever need it, but I won't.
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    If you wear a CGM, what do you do when a sensor fails?

    Home > LC Polls > If you wear a CGM, what do you do when a sensor fails?
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    Have you ever used a digital health coaching app (ex: One Drop, mySugr, Livongo, etc.)? If so, share your experience in the comments!

    Sarah Howard

    Sarah Howard has worked in the diabetes research field ever since she was diagnosed with T1D while in college in May 2013. Since then, she has worked for various diabetes organizations, focusing on research, advocacy, and community-building efforts for people with T1D and their loved ones. Sarah is currently the Senior Marketing Manager at T1D Exchange.

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    25 Comments

    1. Bob Durstenfeld

      Dexcom is usually pretty good about replacements.

      5 years ago Log in to Reply
    2. Ahh Life

      Other. I call, but only after several have failed prematurely. I recently had 9 not meet their life expectancy. I suspect it was a bad batch. I called after several months. ( ͠° ͟ʖ ͡°)

      5 years ago Log in to Reply
    3. Thomas Hatton

      Minimed sensors fail often. I had one earlier this week. The medtronic diabetes store has a replacement link on the main menu. They will only replace 3 over a 3 month span. Because they cost so much i don’t hesitate ordering replacements. That’s how I know about the limit. If the sensors were more reliable, they wouldn’t have this problem.

      5 years ago Log in to Reply
    4. joan Fray

      I save it. Then call Dexcom and they are good about replacing them. I’ve only had two fail in three years. They always want me to send the old one back to them.

      5 years ago Log in to Reply
    5. connie ker

      I was having trouble with the Abbott Freestyle Libre staying on my arms, until I started using the clear tape that is worn over the entire sensor. It keeps the sensor on for the entire 2 weeks and my supplier does not charge extra for the tape, I just have to ask for it. So live and learn, but do what works best for you.

      5 years ago Log in to Reply
    6. Clare Fishman

      I recently found out that I can just go to Dexcom tech support online at https://www.dexcom.com/support You can put in your sensor problems or “chat” with a support person online. I have not had a sensor fail in more than a year, but when it does I always request a replacement.

      5 years ago Log in to Reply
    7. Gene Maggard

      I’ve only had one Dexcom G6 sensor fail in almost three years, so didn’t follow up. When I was using Minimed sensors I had a lot of problems and had several replaced. My situation now is that under my Medicare Advantage plan I don’t pay anything for the Dexcoms so an occasional one failing isn’t a big deal for me.

      5 years ago Log in to Reply
    8. William Bennett

      Website, because Dexcom offers a chat option on their contact page that is 20X faster and more responsive than calling and sitting on hold for hours. It’s limited to business hours Pacific time, but that’s not a huge problem even for an East Coaster like me.

      5 years ago Log in to Reply
    9. Lorri McLuckie

      I’ve had several sensor failures and always call for a replacement. Yesterday I had a transmitter fail and also called for a replacement for that.

      5 years ago Log in to Reply
    10. Amanda Barras

      A failed sensor happens so rarely that I throw it and just start anew with out worrying. I usually extend my sensors and get a an extra 4-5 days of wear beyond its life expectancy. So, with that I gain more time than I lose when one does fail.

      5 years ago Log in to Reply
    11. Kristen Clifford

      I throw out the one that failed and put on a new one. End of story.

      5 years ago Log in to Reply
    12. Kris Sykes-David

      Funny you should ask! Just last night my transmitter for my G6 failed after 20 days. I called Dexcom and they acted quickly, as always when I have a problem. After the warmup on the new sensor/transmitter combo, my readings were LOW. That’s not what my finger stick told me! Well, since it was late, I gave it overnight to “cook” to see if there would be any change in numbers. (I actually turned off my receiver and Bluetooth on my phone, no way to sleep with that racket!) This morning it is up a bit higher but over 50+ points off. Time to call Dexcom again ……

      5 years ago Log in to Reply
    13. Abigail Elias

      Not a common event but I call because they like defective products returned for quality control and troubleshooting.

      5 years ago Log in to Reply
    14. Angela Naccari

      I use the Tandem X2 pump and Dexcom G6. The last time I had a problem with the transmitter failing early (just a few weeks after used), Tandem replaced the transmitter and the sensor that was lost

      5 years ago Log in to Reply
    15. Ceolmhor

      My answer isn’t as simple as the choices you provide. My Medtronic sensors are supposed to last a week. If the failure occurs in the last 2-3 days, I just throw it away. If it fails early, and my supply is low, I call for a replacement. If it fails early, and my supply is more than I need (that’s most of the time), I still call to see if they want the failed sensor returned for investigation. They request that less frequently these days, but sometimes it helps them discover the causes of their failures.

      5 years ago Log in to Reply
    16. Megan L

      Mine rarely fails, but when it does, I just get a replacement from the website (Medtronic). Much faster (and not having to deal with a frustrated representative), in my opinion.

      5 years ago Log in to Reply
    17. Elizabeth Thompson

      Medtronic always replace them but I didn’t know you could get a replacement sensor from the website. I thought you had to speak to a representative and answer all the questions etc! Takes a while for sure. Someone commented on getting more time from your sensor. How do you do that? Mine tells me to replace it after 7 days and the transmitter no longer receives readings. Thanks.

      5 years ago Log in to Reply
    18. KarenM6

      Mine fail about 55% of the time (and I have an Excel spreadsheet to prove it.) ;p One of the only times I’ve geeked out on data! ;p So, if a sensor fails on the 8th or 9th day, I just let it go. But, if it fails between 1 and 7 days, I _generally_ call for a replacement (especially if I’m low on sensors). Dexcom has always been fantastic with the customer service on this issue. I appreciate that about them so much. (I’m very excited to see what their G7 will be like!)

      5 years ago Log in to Reply
    19. Ann Taylor

      I very rarely have trouble – the last time I had a problem it was my transmitter that died Does anyone else have an issue with the Dexcom 6 being way off from the finger sticks? In the morning it can be right on or very close and by lunch it can be 30 or more off

      5 years ago Log in to Reply
    20. Cheryl Seibert

      Dexcom’s Live Chat feature on their support website is the easiest way to obtain a replacement. Plus everything discussed is documented. The tech support folks are extremely helpful and kind.

      5 years ago Log in to Reply
    21. Derek West

      This is for Elizabeth who questioned how to get her Medtronic sensor to last more than 7 days. I leave mime inserted but disconnect the transmitter and re-charge it. I then tell the pump it is a new sensor and it happily goes through the warm up procedure. To be able to remove the transmitter I use surgical tape to hold it in lace the first week, which comes off relatively easily. I only use the sensor for 2 weeks.

      5 years ago Log in to Reply
    22. Sasha Wooldridge

      I had no idea they would replace them now! I started with a Dexcom WAY back at the beginning for me, so 10 years ago or so. I argued so much with everyone about getting them replaced that I gave up and that’s when I started reusing them to create a stockpile just in case. I never revisited the issue in all this time. Good to know this is an option now!

      5 years ago Log in to Reply
    23. Molly Jones

      I chose other as my main goal was to call the company and report issues with the sensor, so cause could be found and prevented. I always receive a replacement, which is nice. I am curious if I have issues with my sensors about a quarter of the time due to quick fluctuations in BG. It can be difficult to find the right time to start a session when my BG will be stable.

      5 years ago Log in to Reply
    24. Bonnie Lundblom

      I’m on Medicare now and switched to the Dexcom CGM 6 in September. I’ve had multiple sensors fail since then and one transmitter that only lasted 4 weeks. When I call Dexcom tech support I’ve been told if the readings are off significantly from finger sticks and calibration doesn’t rectify this I’m to remove the sensor, apply a new one, and call for a replacement.

      5 years ago Log in to Reply
    25. Elizabeth Thompson

      Thanks, Derek! Appreciate you taking the time to explain.

      5 years ago Log in to Reply

    If you wear a CGM, what do you do when a sensor fails? Cancel reply

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