-Kirk Tjalas, F.N.P.

Kirk Tjalas, F.N.P., provides exceptional care and meticulous attention to detail for every patient concern, ensuring comprehensive and personalized treatment for optimal health outcomes.

Medical Consultation

What if you could watch your blood sugar change in real time ,every minute of the day, without a single fingerstick? For millions of people managing diabetes, that’s no longer a distant vision. It’s what continuous glucose monitoring makes possible right now.

The numbers reflect a technology in full momentum. The global continuous glucose monitoring market was valued at over $13 billion in 2025 and is projected to reach $31 billion by 2031 ,one of the fastest-growing segments in all of healthcare. In the U.S. alone, approximately 38.4 million Americans live with diabetes, and expanding insurance coverage means more patients than ever before are now eligible for continuous glucose monitoring devices.

More importantly, the clinical evidence is compelling: research published in 2025 shows that CGM users achieve HbA1c reductions of 0.25%–3.0% and improve their time in target glucose range by 15%–34%. These aren’t incremental numbers ,they represent meaningful reductions in the daily burden of diabetes and the long-term risk of complications.

This guide covers everything you need to know about continuous glucose monitoring: how it works, who should use it, what devices are available in 2026, and how to get started.

What Is Continuous Glucose Monitoring and How Does It Work?

Continuous glucose monitoring is a wearable technology that measures your glucose (blood sugar) levels automatically, around the clock, without requiring repeated fingerstick tests. Here’s the basic setup:

A small sensor is inserted just beneath the skin ,typically on the upper arm or abdomen ,where it measures glucose in the fluid surrounding your cells (called interstitial fluid)
A transmitter attached to the sensor sends readings wirelessly to your smartphone or a dedicated receiver
Readings typically arrive every 1–5 minutes, giving you a continuous stream of glucose data
Most systems also provide trend arrows showing whether your glucose is rising, falling, or holding steady ,so you can act before a problem develops
Alerts can be set to notify you when glucose goes too high or too low, including while you sleep

Most modern continuous glucose monitoring sensors are worn for 10–15 days before replacement, with some newer implantable options lasting up to a full year. No daily calibration is required for the latest generation of devices.

If you’ve been working to understand how glucose behaves in your body, our posts on Understanding A1C Levels and Managing Blood Sugar Spikes pair well with this guide.

Who Should Use a CGM? Eligibility and Clinical Guidelines

The American Diabetes Association’s 2026 Standards of Care broadly recommends continuous glucose monitoring for a wide range of patients. You may be a strong candidate if you:

Have type 1 diabetes ,CGM is considered a cornerstone of management
Have type 2 diabetes on insulin (basal or intensive regimen) ,Medicare and most private insurers now cover CGM for this group following a major 2023 CMS policy expansion
Experience hypoglycemia unawareness ,the inability to feel the warning signs of low blood sugar, which CGM can detect automatically
Have difficulty achieving target A1C levels despite active management
Are managing diabetes during pregnancy (gestational or preexisting)
Want to better understand how food, exercise, stress, and sleep affect your glucose ,even without a formal diabetes diagnosis

Beyond traditional diabetes care, continuous glucose monitoring is increasingly used by people with prediabetes and even metabolically healthy individuals seeking deeper insight into their metabolic health. Understanding insulin resistance early is one of the strongest motivations for CGM use outside of diagnosed diabetes.

Chronic stress and burnout ,which directly elevate cortisol and disrupt glucose regulation ,are another reason some patients seek CGM. Our posts on Quiet Burnout and Preventive Mental Health Care explore this connection.

Top CGM Devices Available in 2026

The continuous glucose monitoring landscape has never had more options. Here’s a practical overview of the leading systems:

Abbott FreeStyle Libre 3 Plus The world’s smallest CGM sensor ,roughly the size of two stacked pennies ,sends readings every minute via Bluetooth. It integrates with automated insulin delivery (AID) systems including Tandem t:slim, Omnipod 5, and iLet. Suitable for children aged 2 and older.

Dexcom G7 Provides readings every 5 minutes with a fast 30-minute warm-up. Known for accuracy and compatibility with a wide range of insulin pumps and smartphones. The G7 is FDA-cleared and widely available in 2026 following a manufacturing correction Dexcom resolved in late 2025.

Medtronic Instinct (by Abbott) Launched in September 2025, this is Medtronic’s smallest sensor, offering 15 days of wear, no required calibration, and a one-hour warm-up. Works seamlessly with the MiniMed 780G closed-loop insulin system.

Eversense 365 The world’s first one-year implantable continuous glucose monitoring system for adults, recently FDA-approved. A single insertion provides year-round monitoring with a removable transmitter ,transformative for patients who want to minimize device changes.

Each device has different strengths. Talk to your care team about which system aligns with your lifestyle, tech comfort level, and insurance coverage.

The Real-World Benefits: What the Evidence Shows

The clinical case for continuous glucose monitoring has grown substantially. A 2025 review published in Endocrinology and Metabolism analyzed outcomes across both type 1 and type 2 diabetes populations and confirmed:

HbA1c reductions of 0.25%–3.0% depending on baseline control and patient type
Time in range improvements of 15%–34% ,meaning significantly more hours per day within a healthy glucose window
Fewer hypoglycemic events, including dangerous overnight lows
Reduced emergency department visits and hospitalizations ,a real-world Aetna claims analysis showed meaningful declines in healthcare resource utilization among new CGM users
Better self-management decisions around food, exercise, and medications, because patients can see cause and effect in real time

For people managing type 2 diabetes reversal through lifestyle intervention, CGM offers something uniquely valuable: immediate feedback that reinforces healthy habits. Seeing your glucose response to a meal or a walk can be far more motivating than a quarterly lab result.

For women navigating perimenopause in their 30s and 40s, where hormonal shifts increase metabolic vulnerability, CGM can be a powerful tool for staying ahead of glucose instability.

Navigating Insurance Coverage and Cost

Cost and access remain real barriers for some patients, but coverage has expanded considerably:

Medicare now covers CGM for type 2 patients on basal-only insulin following the 2023 CMS policy change, adding approximately 1.5 million beneficiaries to the eligible pool
Most private insurers cover CGM for type 1 diabetes and for type 2 patients on intensive insulin regimens
Over-the-counter options are increasingly available, with some sensors priced below $100 for a 14-day wear period, making them accessible without a prescription
If coverage is denied, your care team can submit supporting documentation (such as A1C history or hypoglycemia records) to support a medical necessity appeal

If you’re navigating confusing healthcare billing or coverage decisions, our post on Medicare Improper Payments offers important context on the accountability landscape in U.S. healthcare.

Your Glucose Story, in Real Time

Continuous glucose monitoring has shifted diabetes care from reactive to proactive ,from guessing to knowing. Whether you’re managing type 1 diabetes, working to reverse type 2 through lifestyle changes, navigating prediabetes, or simply trying to understand your metabolic health more deeply, CGM technology in 2026 is more accessible, accurate, and actionable than at any point in history.

At Priority Medical Group, we believe that informed patients are empowered patients. If you’re curious about whether continuous glucose monitoring is right for you, the best next step is a conversation with your care team.

Ask about CGM at your next visit ,your glucose data could change everything.

FAQ:

1. Does a CGM hurt to insert or wear?	Most patients report only a mild pinch during sensor insertion, comparable to a small injection. Once in place, the sensor is generally not noticeable during daily activities, exercise, or sleep. Skin irritation can occasionally occur at the adhesive site, and your provider can suggest solutions if this becomes an issue.
2. How accurate is continuous glucose monitoring compared to a fingerstick test?	Modern continuous glucose monitoring devices measure glucose in interstitial fluid rather than blood, which means readings may lag actual blood glucose by a few minutes during rapid changes. Accuracy is measured by MARD (mean absolute relative difference); leading 2025–2026 devices achieve MARD values of under 9%, making them highly reliable for clinical decision-making. Most no longer require daily fingerstick calibration.
3. Can I use a CGM if I have type 2 diabetes but I’m not on insulin?	Yes, and evidence increasingly supports it. The ADA’s 2026 Standards of Care note that people with type 2 diabetes benefit from CGM across therapy types, including those not using insulin. It can help you and your care team understand how specific foods, activities, and stress levels are affecting your glucose ,directly informing blood sugar management strategies.
4. How does a CGM interact with GLP-1 medications like Wegovy?	CGM and GLP-1 receptor agonists are increasingly used together. CGM data helps providers personalize and titrate GLP-1 dosing by showing real-time glucose trends, while GLP-1 medications can improve glycemic variability ,making CGM readings more stable over time. Learn more about newer GLP-1 options in our post on Oral Wegovy vs. Injectable.
5. Is continuous glucose monitoring covered by insurance?	Coverage depends on your diagnosis, treatment regimen, and insurance plan. Medicare covers CGM for most insulin-using patients with diabetes. Many private insurers follow similar guidelines. Over-the-counter sensors are also available without a prescription. It’s worth calling your insurer directly or asking your provider’s office to check your benefits before assuming you’ll pay out of pocket.
6. Can people without diabetes benefit from wearing a CGM?	There is growing interest ,and emerging research ,around continuous glucose monitoring use in people without diabetes, including those with prediabetes or insulin resistance, athletes, and wellness-focused individuals. While not yet formally recommended for healthy adults by major guidelines, the data on non-diabetic CGM use is accumulating rapidly and some providers are offering it as a preventive health tool.

SEE MORE HERE

“Experience exceptional care with Kirk Tjalas, F.N.P. Book your appointment now and take charge of your health with confidence and badassery.”

Weight loss Awaits You

References

Moon, J.S. et al. (2025). Advances in Continuous Glucose Monitoring: Clinical Applications. Endocrinology and Metabolism (Seoul). https://pmc.ncbi.nlm.nih.gov/articles/PMC12061739/
American Diabetes Association Professional Practice Committee. (2026). 7. Diabetes Technology: Standards of Care in Diabetes—2026. Diabetes Care, 49(Suppl. 1): S150–S165. https://diabetesjournals.org/care/article/49/Supplement_1/S150/163922/7-Diabetes-Technology-Standards-of-Care-in
Aetna/JMCP Study. (2024). Initiating continuous glucose monitoring is associated with improvements in glycemic control and reduced health care resource utilization. Journal of Managed Care & Specialty Pharmacy. https://www.jmcp.org/doi/10.18553/jmcp.2024.24255
Sugimoto, H. et al. (2025). Use of continuous glucose monitoring to stratify individuals without diabetes. Communications Medicine. https://www.nature.com/articles/s43856-026-01523-8
Health Science Reports / PMC. (2025). Transformative Advances in Continuous Glucose Monitoring and the Impact of FDA Over-the-Counter Approval on Diabetes Care. https://pmc.ncbi.nlm.nih.gov/articles/PMC12007415/
T1D Strong. (2026). 6 Best Continuous Glucose Monitors for 2026: Most Accurate and Latest Devices Reviewed. https://www.type1strong.org/blog-post/6-best-continuous-glucose-monitors-for-2026-most-accurate-and-latest-devices-reviewed
Mordor Intelligence. (2026). United States Continuous Glucose Monitoring Market Size, Trends Report & Share 2031. https://www.mordorintelligence.com/industry-reports/us-continuous-glucose-monitoring-market
Precedence Research. (2025). Continuous Glucose Monitoring (CGM) Device Market. https://www.precedenceresearch.com/continuous-glucose-monitoring-device-market
American Diabetes Association. (2024). Patterns and Trends in Continuous Glucose Monitoring Utilization Among Commercially Insured Individuals With Type 1 Diabetes. Clinical Diabetes, 42(3). https://diabetesjournals.org/clinical/article/42/3/388/154160
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). (2024). Continuous Glucose Monitoring. https://www.niddk.nih.gov/health-information/diabetes/overview/managing-diabetes/continuous-glucose-monitoring

Disclaimer

This article is provided for informational and educational purposes only and does not constitute medical, legal, or financial advice. Reading this content does not create a patient-provider relationship with Priority Medical Group or any of its clinicians. Individual health circumstances vary; always consult a qualified healthcare professional before beginning, changing, or stopping any treatment or monitoring approach. For questions about Priority Medical Group services, visit pmgcare.com.

CGM (Continuous Glucose Monitoring): A Patient’s Complete Guide