Dexcom continuous glucose monitors are covered by most insurance plans for people with Type 2 diabetes, but coverage almost always depends on how you manage your diabetes, specifically whether you use insulin. If you take insulin (injections or a pump), your chances of getting full coverage are high. If you don’t use insulin, coverage is harder to get, though options are expanding.
What Most Insurance Plans Require
The general rule across commercial insurers, Medicare, and Medicaid is the same: you need to be on insulin therapy or have documented problems with low blood sugar. A typical prior authorization form, like the one used by Johns Hopkins Health Plans, asks your doctor to confirm several things before approving a Dexcom CGM:
- Insulin use: You require three or more daily insulin injections or use an insulin pump.
- Blood sugar problems: You experience frequent severe low blood sugar (below 50 mg/dL), episodes where someone else had to help you recover from low blood sugar, or an A1c of 7% or higher.
- Training: You or a caregiver have received education on using the CGM device and will share readings with your provider.
You don’t necessarily need to meet every criterion. Most plans require insulin use plus at least one of the blood sugar criteria. Your doctor fills out the prior authorization form and submits it to your insurer, and the turnaround is typically a few days to a few weeks.
Medicare Coverage for Type 2 Diabetes
Medicare covers Dexcom CGMs for people with Type 2 diabetes who take insulin. As of April 2023, Medicare extended eligibility to anyone on insulin, not just those on intensive insulin regimens. Previously, you needed to be checking your blood sugar multiple times per day and using three or more daily injections to qualify. The updated policy is simpler: if you take insulin, you’re eligible.
Medicare also covers CGMs for people who aren’t on insulin but have problematic hypoglycemia. This is less common with Type 2 diabetes, but it can happen with certain oral medications. Before prescribing, your provider must meet with you to evaluate your condition and confirm you’ve had adequate training on the device.
One practical detail worth knowing: traditional Medicare covers CGMs only as durable medical equipment (DME), which means you’ll order through a DME supplier rather than picking it up at a pharmacy. Medicare Advantage plans, on the other hand, often cover CGMs through pharmacy benefits, which can be more convenient and sometimes cheaper depending on your plan’s cost-sharing structure.
Medicaid Coverage Varies by State
As of mid-2023, 45 states and Washington, D.C. provide some level of Medicaid coverage for CGMs, up from 40 states in late 2021. Coverage is expanding, but the details vary significantly from state to state. Some states cover CGMs for both Type 1 and Type 2 diabetes, while others limit coverage to Type 1 only. Prior authorization requirements, eligible prescribers, and whether the device is classified as a pharmacy or DME benefit all differ depending on where you live.
Five states (Arizona, Kansas, New Jersey, New Mexico, and Hawaii) had no published fee-for-service CGM coverage as of that date. That doesn’t mean coverage is impossible in those states. CGMs may still be approved on a case-by-case basis through medical necessity determinations, or a managed care organization may cover them voluntarily as a value-added benefit. If you’re on Medicaid and your state doesn’t have clear coverage, it’s worth having your doctor submit a medical necessity request.
DME vs. Pharmacy Benefits: Why It Matters
Your Dexcom CGM can be covered under two different insurance benefit categories, and which one applies to you affects both cost and convenience. Under durable medical equipment (DME) benefits, your doctor writes a prescription stating medical necessity, and you order through a specialized DME supplier. Under pharmacy benefits, you fill the prescription at a retail pharmacy like CVS or Walgreens, or through mail order.
The cost difference can be meaningful. Your insurer may charge you 20% of the cost through DME but only 10% through pharmacy, or vice versa. It’s worth calling your insurer to ask which benefit category your CGM falls under and what your specific copay or coinsurance would be through each pathway. According to Dexcom, most people with CGM coverage pay $20 or less per month out of pocket, though individual pricing varies by plan.
If You Don’t Use Insulin
This is where things get more challenging. Most insurers, including Medicare, built their CGM coverage policies around insulin-dependent patients. If you manage your Type 2 diabetes with oral medications, diet, or lifestyle changes alone, standard Dexcom models (like the G7) will generally not be covered.
Dexcom developed a product specifically for this gap. The Stelo biosensor, cleared by the FDA in 2024 as the first over-the-counter glucose biosensor, doesn’t require a prescription. It’s designed for people with Type 2 diabetes who aren’t on insulin or who are newly diagnosed. Because it’s sold over the counter, it’s purchased directly rather than billed through insurance. Dexcom has positioned Stelo explicitly as an option “for those who do not have insurance coverage for CGM.”
The tradeoff is clear: Stelo gives non-insulin Type 2 patients access to continuous glucose data without navigating insurance barriers, but the full cost comes out of your pocket. If you’re on the edge of qualifying for insurance coverage (for example, if your A1c is above 7% and your doctor is considering adding insulin), it may be worth discussing a prescription Dexcom G7 with your provider first to see if your plan will cover it.
How to Improve Your Chances of Approval
Insurance denials for CGMs are common, but many can be overturned with the right documentation. Before your doctor submits a prior authorization, make sure your medical records clearly reflect the criteria your insurer requires. That means recent A1c results, a log of your insulin regimen (including frequency), and any documented episodes of low blood sugar. If you’ve had hypoglycemic events that required someone else’s help, those should be in your chart.
If you’re denied, ask for the specific reason. Sometimes the issue is administrative, like a missing piece of documentation, rather than a true coverage exclusion. Your doctor’s office can submit an appeal with additional clinical notes. Dexcom also offers coverage support through its website to help patients and providers navigate the process.