Dexcom class action lawsuit overview:
- Who: Plaintiff Kelly Grisoli filed a class action lawsuit against Dexcom Inc.
- Why: Grisoli claims Dexcom manufactured, marketed and sold defective glucose monitors, which she purchased for her diabetic son.
- Where: The Dexcom class action lawsuit was filed in California federal court.
A new class action lawsuit accuses Dexcom of manufacturing, marketing and selling defective glucose monitors that are prone to dangerous alert failures.
Plaintiff Kelly Grisoli says she relied on Dexcom’s marketing claims when she purchased the G7 glucose monitor for her diabetic son. According to the Dexcom class action lawsuit, the device failed to perform as promised — often giving inaccurate glucose readings and missing critical alerts — forcing her to rely on fingerstick tests to verify results.
Grisoli also claims the G7 sensors failed to last the advertised 10-day wear period, sometimes malfunctioning after just two days and requiring frequent replacements. When she requested help, Dexcom allegedly threatened to deny replacements, saying she had ordered too many in one month.
The Dexcom class action lawsuit further alleges the company falsely marketed the G7 Continuous Glucose Monitoring System as a superior, FDA-approved medical device that would “continuously and accurately track glucose levels.” In reality, Grisoli says, the devices are defective and put users at risk of severe hypoglycemia, hyperglycemia, seizures, coma or death due to inaccurate readings and delayed or failed alerts.
Dexcom allegedly continued to market defective glucose monitors
Dexcom recalled the G7 glucose monitors in June and September, Grisoli claims, after the FDA announced nationwide Class I recalls for the devices due to safety issues that caused failures or delays in providing critical low- or high-glucose alerts.
Grisoli claims Dexcom continued to market and sell the G7 glucose monitors despite knowing they were defective.
“Consumers, including Plaintiff and Class Members, paid a substantial premium for the G7 CGM based on these misrepresentations and omissions, only to receive a product that failed to perform as promised, was subject to government recall and posed a serious safety risk,” the Dexcom class action lawsuit says.
Grisoli claims Dexcom is guilty of violating multiple consumer protection and warranty statutes, including California’s Consumers Legal Remedies Act, Unfair Competition Law and False Advertising Law, as well as express and implied warranty provisions under state and federal law.
Grisoli demands a jury trial and requests declaratory judgment and an award of actual, compensatory and punitive damages for herself and all class members.
In 2024, Tandem Diabetes Care recalled its t:connect mobile app for Apple iOS, used with the t:slim X2 insulin pump, after reports that the app could crash, leading to battery drain and under-delivery of insulin.
Have you ever purchased a Dexcom G7 glucose monitor? Let us know in the comments.
The plaintiff is represented by C. Moze Cowper and Paige Miller of Cowper Law LLP and Adam J. Levitt of DiCello Levitt LLC.
The Dexcom class action lawsuit is Grisoli v. Dexcom Inc., Case No. 8:25-cv-02333, in the U.S. District Court for the Central District of California.
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32 thoughts onClass action lawsuit says Dexcom sold G7 glucose monitors that failed to warn of life-threatening glucose levels
Been trying to utilize this system since they came out. Upgraded from the G6 system, which was usually within 20 points of the glucose reading my standard monitor would show, but the G7 is defective all the way – can’t keep the sensors on, they make it maybe 2 days on average before falling off so I tried the over patch (Dexcom’s and other retail models), alternate sights, surgical tape, even eyelash glue (read about it on a forum) & the longest I’ve worn 1 was 5 days – one time – and on day 5 it failed – wasn’t loose or wet or in any way disturbed to cause it to stop working, it just failed for no reason. They replace them but you have to contact them every single time & open a ticket, answer a ton of questions about the failed sensor, wait for a new 1 to ship & arrive … yada yada & in the meantime no CGM. When & if they stay on, the readings they give are wildly inaccurate, 50+ points off at times, which is a very dangerous amount of insulin to take or skip taking for a diabetic person, I’m lucky that my readings were nearly always higher than they actually were – A LOT, I still had the stress and missed sleep from the thing going off every night multiple times alerting me and my husband I was crashing and should treat the low, only to check with my monitor & see I was completely within the normal range. Lost so many nights of sleep we both needed desperately before work – try falling back to sleep when you’re awakened to a loud, sudden raucous beeping or clanging noise telling you you’re in danger 5 or 10 times. We finally started ignoring it, but I then had to wake up at least 2 times a night & check it manually just in case – which totally defeats the purpose of a CGM, which I finally gave up on using completely after close to 2 years struggling to get it to work as it should – but thankfully it didn’t give me many false highs that might have resulted in my overdosing on insulin. My heart goes out to those who have gone through that – and to every diabetic individual who’s purchased this product and invested their trust, money, time & effort on a device that could literally cause them to die from it’s poor design and the maker’s negligence. I’d like to join the suit and see them have to pay for their deceitful and careless design, marketing production of the G7.
Question live in Rhode Island. DO not remember the year. 2023, 2024 don’t remember. However it was a Friday went to store. I was on insulin pump. On way back by myself was delusional, scared, lost crying because didn’t know where I was. Dexcom never beeped, nothing. Parked car to try to gather myself. Deep breath found my way home. Was 3 streets over. Early Saturday morning wife called rescue. They talked to me put sugar in body. Sugar was real low. Was fine after 30 minutes no hospital. Sunday morning early wife had to call rescue again. Sugar low dexcom nothing. Sugar extremely low. Sweating, eyes glossy, can’t talk or hear. Delusional. Took me to hospital was there for days. Always had problems.
I have been in situations where it was telling me my sugar was extremely high and giving myself insulin when my sugar was low
I have called multiple times in reference to the G7 sensor where it was giving me so many different readings saying my sugar is high when it was extremely low saying my sugar was low when it was extremely high feeling so bad weak drained
My dexcom has been giving me wrong reading were I could of died. It would say I was low or some times high . Were then I would give myself more insulin to correct it and the they would go really low. Or it would give me low reading were then I would stop my insulin until it would go up
Dexcom is constantly giving me wrong readings. Sometimes 200 points off.
when this was happen it made me sick in my stomach threw up and everytime i eat i would get sick annd needle in my arm still sore from thelast time i put on arm
I had my health insurance order Dexcom G7. I wasn’t notified ahead of time I would be stuck with a 20% bill on Medicaid?? I’m a veteran and tried to get VA to pay for it? They won’t but now have to get from VA. The health insurance is part owner of Mosiac individual wrapped pills.They push these pills to get Medicaid RX to pay in full but they won’t pay for the Dexcom G7 in full?? Seems like a theft by deception by someone?? Who can I go after to get reimbursement for $200 and more for it not working correctly on the iPhone app and sensors not working correctly on 2 of them?? Thanks.
I got a letter from cigna healthcare about my dexcom g7 receiver ndc 08627-0078-01 parts number MT26403-0 said fda so i want to join in the lawsuit
I got a letter from cigna healthcare about my dexcom g7 receiver ndc 08627-0078-01 parts number MT26403-0 said fda so i want to join in the lawsuit i got dibetes type 2 it said low sugar and the reading would be 45 or 50