For people living with diabetes, keeping blood sugar levels in check is a daily challenge. Medicare now offers meaningful coverage for continuous glucose monitors (CGMs), giving eligible beneficiaries access to life-changing technology that can reduce the risks associated with poorly managed glucose levels. It’s helpful to understand how CGM coverage works.
What Is a Continuous Glucose Monitor?
A continuous glucose monitor, commonly called a CGM, is a medical device that tracks blood sugar levels in real time throughout the day and night. Unlike traditional finger-stick testing, which only captures a single moment in time, a CGM provides ongoing readings that help patients and their healthcare providers see trends and patterns in glucose levels. This deeper level of insight can be essential for making informed treatment decisions and avoiding dangerous highs and lows.
Medicare classifies CGMs as durable medical equipment (DME) under Part B, which means coverage rules are similar to other medically necessary devices a beneficiary might use at home (source). Both non-adjunctive CGMs—those used to make treatment decisions without a separate blood glucose meter—and adjunctive CGMs fall within this DME classification following a 2022 determination by the Centers for Medicare and Medicaid Services (source).
Who Qualifies for Medicare CGM Coverage?
Eligibility for Medicare CGM coverage hinges on several specific criteria. A beneficiary must have a confirmed diabetes mellitus diagnosis, and the device must be ordered by a treating doctor or other qualified healthcare provider (source). The person receiving the CGM, or a designated caregiver, must also have completed adequate training to operate the device safely and as directed.
Insulin use is one of the primary pathways to eligibility. As of April 16, 2023, when expanded CMS coverage rules took effect, any insulin-treated beneficiary can meet the treatment pathway regardless of the type or amount of insulin used, provided Medicare’s other CGM coverage requirements are also satisfied (source). This change opened the door for a broader group of insulin-treated patients who may have been excluded under the older guidelines.
People with diabetes who do not use insulin can still qualify if they have a documented history of problematic hypoglycemia. Specifically, this includes individuals who have experienced recurring level 2 hypoglycemic events—defined as blood glucose dropping below 54 mg/dL—or at least one level 3 event where outside assistance was needed to recover (source). These thresholds reflect serious, potentially life-threatening situations that a CGM is uniquely positioned to help prevent.
The Provider Visit Requirement
One important step in the CGM coverage process involves a required clinical visit. Within six months before a CGM is ordered, the treating practitioner must evaluate the patient’s diabetes management during an appointment (source).
Importantly, this evaluation does not have to happen in person—it can take place through a Medicare-approved telehealth platform, making it more accessible for beneficiaries in rural areas or those with mobility limitations (source). This requirement ensures that CGM prescriptions are grounded in a current clinical assessment, which helps confirm that the device is medically appropriate for the individual at the time of ordering.
Medicare also requires ongoing follow-up after the CGM is initially approved. For continued coverage, the treating practitioner must conduct an in-person or Medicare-approved telehealth visit every six months and document that the beneficiary is following the prescribed CGM regimen and diabetes treatment plan (source). Keeping these appointments is important because continued Medicare payment for the device and related supplies depends on meeting this requirement.
Understanding Cost-Sharing Under Part B
Once a beneficiary meets the eligibility requirements and the Part B deductible has been satisfied, Medicare covers the device and related supplies at 80% of the approved cost. The remaining 20% is the patient’s responsibility (source). Supplemental insurance or Medigap plans may help cover that remaining portion, depending on what the individual carries.
Choosing the right supplier matters. When a DME supplier does not accept Medicare assignment, patients may face charges that exceed the Medicare-approved amount, resulting in higher out-of-pocket costs (source). Beneficiaries are encouraged to verify that their CGM supplier participates in Medicare before finalizing any arrangement.
How the 2023 Coverage Expansion Changed the Landscape
The March 2023 CMS announcement represented a significant shift in how Medicare approaches CGM access. Before this change, coverage rules were more restrictive, leaving some people with diabetes without access to real-time monitoring technology despite clear medical need. The revised criteria acknowledged that insulin therapy is not one-size-fits-all and that even patients on lower doses benefit from continuous monitoring (source).
By also extending coverage to non-insulin users with documented hypoglycemia histories, CMS recognized that dangerous glucose drops do not only affect those on insulin. The updated policy reflects a more comprehensive understanding of diabetes management and positions CGMs as a standard tool rather than a specialty device reserved for the most complex cases.
Why You Should Learn More About Medicare CGM Coverage
Medicare coverage for continuous glucose monitors has expanded significantly, making it more accessible than ever for eligible beneficiaries living with diabetes. Whether a person uses insulin or manages glucose through other means, understanding the current eligibility rules can open doors to better daily health management.
The 2023 coverage changes broadened who qualifies, and the telehealth-friendly provider visit requirement has made the process more convenient. With proper documentation, a qualifying diagnosis, and the right DME supplier, many Medicare beneficiaries may find that a CGM is well within their reach. Reviewing the specific requirements with a healthcare provider is a meaningful step toward understanding what Medicare may cover for any individual’s situation.