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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19 thoughts onClass action lawsuit says Dexcom sold G7 glucose monitors that failed to warn of life-threatening glucose levels
My daughter has used dexcom G6 from 2018-2024 and has used the G7 since 2024 into present day. She has had many, many issues with both sensors. Whether it be no alarms, failures or adhesive not being sticky!
My husband has had to call multiple times for replacements.
They quit working for no reason.
My 6 year old daughter was recently admitted to the ER and was in DKA. She had to be transported by ambulance to PICU at children’s hospital. Instead of being 280 like her Dexcom said she was actually 480. 200 points off. To top it off once we removed the dexcom it was revealed that the needle was bent in her skin. So why did the Dexcom continue to read her and not give a sensor alert signal? We could have lost her. Shame on Dexcom! I should also mention that I was called to her school Thursday becuase that sensor had failed (2 days before it was suppose to even be changed). I replaced it with the one that caused her to go into DKA.
Hello, I’m 25 years old. Only been a type 1 for 5 years now. It’s been a long hard journey to finally get my sugars and health on track. Last year around this time I ended up in dka from failed sensors as well as on the 4th of July last year. I used to not have to worry about the incorrect readings or malfunctions until that. And then this year started in the beginning it was just a couple every month that was malfunctioning. I had already got my replacements so I had to start keeping every Dexcom box i opened just in case it would fail so I can call them and give them the serial number therefore they have to replace it. Well after a couple months those couple turned into a few and now I literally had to call again today bc 5 out of 7 sensors I got which were all replacements from the prior month have failed or malfunctioned in one way or another. My insurance does pay for my supplies for the most part which I am grateful for, however this is starting to get so ridiculous. It puts more stress on us and our families. It’s putting our life’s at risk. My fiancé is the one that informed about this lawsuit. I knew others were having problems with the product just would’ve never expected this many people on top of the amount of time they have had to fix this problem that appears to just be getting worse.
I was using dexcom 7 for a year everything was ok, I ha 2 that dint work. Then all of a sudden they did not work. 95.00 down the tubes. I tried the other brand that were also not working another 95.00. I went back to dexcom 7 after I read an article that they screwed up. I had high highs and lows while this mes washappening
I had numerous issues and after a year switched to another company. Being on insulin and sometimes getting a high reading to the point taking insulin when not needed only to find out my numbers were fine and now after the shot were to low. Found out if you take pin meds or anything Tylenol based dexcom is the worst one to use
Please add me and my wife to this class action lawsuit, we both use the g7 and it isnt always accurate. My wifes sugar is always showing high then she manually checks it and its the opposite of what it says. For me it says my sugar is fine but when check it its lower than the 100 it says on the app.