ORLANDO, FLORIDA — As increasing data show benefit for continuous glucose monitoring (CGM) devices beyond just insulin-treated diabetes, efforts are being made to optimize the use of CGM in primary care settings.
Currently, Medicare and most private insurers cover CGM for people with diabetes who use insulin, regardless of the type of diabetes or the type of insulin, and for those with a history of severe hypoglycemia. Data are increasingly showing benefit for people who don’t use insulin. As of now, with the exception of some state Medicaid beneficiaries, the majority must pay out of pocket.
Such use is expected to grow with the upcoming availability of two new over-the-counter CGMs, Dexcom’s Stelo and Abbott’s Libre Rio, both made for people with diabetes who don’t use insulin. (Abbott will also launch the Lingo, a wellness CGM for people without diabetes.)
This means that CGM will become increasingly prevalent in primary care, where there is currently a great deal of variability in the capacity to manage and use the data generated by the devices to improve diabetes management, experts said during an oral abstract session at the recent American Diabetes Association (ADA) 84th Scientific Sessions and in interviews with this news organization.
“It’s picking up steam, and there’s a lot more visibility of CGM in primary care and a lot more people prescribing it,” Thomas W. Martens, MD, medical director of the International Diabetes Center at HealthPartners Institute, Minneapolis, told this news organization. He noted that the recent switch in many cases of CGM from billing as durable medical equipment to pharmacy has made prescribing easier, while television advertising has increased demand.
But still unclear, he noted, is how the CGM data are being used. “The question is, are prescriptions just being sent out and people using it like a finger-stick blood glucose monitor, or is primary care really using the data to move diabetes forward? I think that’s where a lot of the work on dissemination and implementation is going. How do we really make this a useful tool for optimizing diabetes care?”
Informing Food Choice, Treatment Intensification
At the ADA meeting, Dr. Martens presented topline data from a randomized multicenter controlled trial funded by Abbott, examining the effect of CGM use on guiding food choices and other behaviors in 72 adults with type 2 diabetes who were not using insulin but who were using other glucose-lowering medications.
At 3 months, with no medication changes, there was a significant overall 26% reduction in time spent above 180 mg/dL (P < .0001), which didn›t differ significantly between those randomized to CGM alone or in conjunction with a food logging app. Both groups also experienced a significant 1.1% reduction in A1c (P < .0001) and about a 4-lb weight loss (P = .014 for CGM alone, P = .0032 for CGM + app).
“The win for people not on insulin is you can see the impact of food choices really quickly with a CGM ... and then perhaps modify that to improve postprandial hyperglycemia,” Dr. Martens said.
And for the clinician, “not everybody with type 2 diabetes not on insulin can get where they need to be just by changing their diets. The CGM is a pretty good tool for knowing when you need to advance therapy.”