What Are the Hidden Costs of OTC CGMs? How Monthly Fees and Insurance Come Into Play
The hidden costs of OTC CGMs can turn what looks like a simple over-the-counter purchase into a recurring expense that rivals a phone bill. For millions of Americans managing diabetes — and the growing number of people without diabetes buying these devices out of curiosity — the sticker price on the box is only the start.
That gap between what a continuous glucose monitor seems to cost and what it actually costs over a year is shaping who gets to use the technology and who keeps pricking their finger.
How an OTC CGM Actually Works
A continuous glucose monitor is a small sensor that sits on the skin and beams readings to an app on a phone. But the sensor itself wears out — it stops functioning, can’t be recharged and must be tossed after a fixed window, typically days to about two weeks depending on the system.
That single design choice is the engine of the ongoing cost. There is no buy-once-use-forever option here.
Over-the-counter CGMs like Stelo and Lingo are sold directly through manufacturers’ websites, not at community pharmacies, according to GoodRx. They’re cleared only for adults 18 and older, don’t issue alerts when glucose runs out of range and aren’t compatible with insulin pumps or automated insulin delivery systems.
What the Sensors, Subscriptions and App Fees Really Cost
The starter kits look approachable. CGM starter kits typically run from $49 to $99, while ongoing subscriptions cost $89 to $250 depending on brand and duration, according to Forbes. Stelo, in particular, currently offers a three-month subscription for $252.
Stack those subscription fees across a full year and the math shifts. The National Endocrinology Specialists pegged the annual cost of continuous glucose monitors at $2,000 to $4,500 without insurance in 2025.
Quality can also vary by brand. “One of my patients thought his diabetes was cured because his CGM showed low blood sugars,” said Dr. Sun Kim, a Stanford University endocrinologist who specializes in treating Type 2 diabetes, “but he just happened to have a bad sensor.”
Because of that, “it’s worth taking time to compare your options and evaluate which features best fit your needs,” said Dr. Thomas Grace, a family medicine physician at Blanchard Valley Diabetes Center and head of clinical advocacy at Dexcom.
Why Money Is Keeping People Off the Technology
Cost isn’t a side issue in diabetes management — it’s a barrier that decides whether people use the tools at all.
About 31% of diabetes patients said they did not self-monitor glucose levels because blood glucose test strips were too expensive, and 47% said they did not self-monitor because testing wasn’t convenient.
In an American Diabetes Association survey of 2,595 people with diabetes, one in 5 said they had skipped or delayed getting a pump or CGM. For half of those people, the reason was financial strain. Another 15% who rely on pumps or CGMs said they had delayed refilling needed supplies during the pandemic — and 70% of them cited financial strain.
A 2021 study published in Diabetic Medicine found cost concerns around diabetes technology stretch beyond money to include time, cost to society, morality and interpersonal relationships, tied to a shared desire for equitable access.
Some people still opt for fingersticks over a CGM, according to Edgepark, because supplies are easier to buy when away from home, may be more affordable and deliver in-the-moment data.
How Insurance Changes the Math
Coverage can dramatically rewrite the price tag. Most insurance plans require prior authorization and documentation from a healthcare provider, after which out-of-pocket costs are often reduced to a manageable copay, the National Endocrinology Specialists noted.
Medicare has expanded its CGM coverage. Since 2023, Medicare beneficiaries who use insulin or have a history of hypoglycemia have been eligible. In 2025, Medicare covered 80% of the approved CGM cost, leaving patients responsible for 20% after meeting their Part B deductible — reducing annual spending to about $600 to $1,200 for many users.
Medicaid is state-dependent. Some states provide CGMs with no cost-sharing; others limit eligibility to Type 1 diabetes patients or require strict documentation.
Patients without insurance can ask their doctor about samples, manufacturer coupons or nonprofit support. Comparing pharmacy prices, using mail-order pharmacies with automatic-refill discounts and tapping employer wellness reimbursements can also trim what comes out of pocket.
For more information: Choosing Between Stelo, Lingo and Levels for Diabetes: Everything to Know About OTC CGMs
This article was created by content specialists using various tools, including AI.
