General information, not medical advice or an insurance coverage decision. MedraxDME operates as an out of network supplier. Coverage, supplier enrollment requirements and patient responsibility depend on the plan and an individual review.
Compare exact names before comparing features
Dexcom G7, Dexcom G7 15 Day and FreeStyle Libre 3 Plus are distinct products. FreeStyle Libre 3 and Libre 3 Plus are also different sensor names. A discussion that drops “Plus” or “15 Day” can accidentally compare the wrong wear duration, age indication or compatibility. Read the full name on the prescribed device and ask the clinician to clarify any uncertainty.
Abbott identifies Libre 3 Plus for people aged 2 and older and describes it as part of the Libre 3 system. The standard Libre 3 sensor has a different age indication. Abbott: FreeStyle Libre 3 system information. Dexcom likewise has separate indications and instructions for standard G7 and G7 15 Day. Dexcom: G7 15 Day and G7 differences.
That naming step may seem small, but it gives every later question a clear subject. It prevents a favorable feature associated with one sensor from being assumed to apply to an entire brand. Keep the same exact names when you contact the insurance plan and dispensing organization.
Wear time and warmup
Standard G7 is intended for up to 10 days of wear with a 12 hour grace period. G7 15 Day is intended for up to 15 days plus a 12 hour grace period and is for adults. Libre 3 Plus is intended for up to 15 days. Standard G7 has an approximately 30 minute warmup; G7 15 Day and Libre 3 Plus have a 60 minute warmup. Dexcom: Sensor wear duration and approved sites, Dexcom: Healthcare professional product FAQs and Abbott: FreeStyle Libre 3 Plus getting started guide.
These are product specifications, not individual performance guarantees. Consider what each duration means for your own routine, but do not extend a sensor beyond its labeled use or apply a different model's instructions. A longer nominal wear period is one consideration among several.
Before changing systems, discuss when training will occur and what monitoring plan applies while a new sensor warms up or if readings are unavailable. That plan should come from your clinical team and the device instructions. A comparison page should help organize questions, not replace individualized treatment advice.
A display you can use reliably
Ask to see how the prescribed system presents readings and alerts, and which supported receiver or app you will use. Abbott's Libre 3 Plus guide describes readings updated every minute on the supported display. That specification alone does not determine which system is most appropriate for an individual. Abbott: FreeStyle Libre 3 Plus getting started guide.
Practical questions include whether you can read the screen comfortably, hear or otherwise notice the available alerts, keep the display charged and navigate the instructions. If a caregiver will help, include that person in training. Ask the clinician which alerts and follow up arrangements are appropriate rather than copying someone else's settings.
Phone compatibility must be checked for the exact model and operating system. A newer phone is not automatically compatible, and installing an app is not proof that the whole configuration is supported. Use each manufacturer's current compatibility resources. If you prefer a dedicated display, confirm the exact receiver or reader and whether it fits the prescribed sensor and benefit arrangement.
Insulin pump compatibility is a separate decision
When a CGM connects to automated insulin delivery, the sensor is one component of a larger prescribed system. Compatibility depends on the pump, sensor version, controller or phone, software and sometimes the specific consumable variant. Do not assume that a sensor which displays readings in its own app can communicate with every pump.
For example, Insulet's current Omnipod 5 information lists several sensor integrations, including G7 systems and Libre Plus systems, while its device table places additional limits on the phone or controller combination. Insulet also identifies distinct compatible Pod variants. Insulet: Omnipod 5 sensor integrations, Insulet: Omnipod 5 device compatibility and Insulet: Sensor compatibility and Pod variants.
Use those resources as a starting point for a discussion with the prescribing team. Ask them to name the complete approved configuration and arrange training before any switch. Do not change pump settings, insulin delivery or a connected sensor based only on a product comparison. This article does not recommend an automated delivery system for your individual circumstances.
Compare insurance access separately from product features
An insurance plan may handle CGM supplies through a medical equipment benefit, a pharmacy benefit or a specific designated organization. The route can differ by plan even when the same brand appears on its website. Ask about the prescribed model, required authorization, supplier access and documentation rather than only asking whether the insurer “covers diabetes supplies.”
For Original Medicare, the CGM coverage criteria and durable receiver rules apply independently of a brand preference. A qualifying diagnosis and prescription do not make every supplier or configuration eligible. Medicare: Continuous glucose monitor coverage and CMS: Glucose Monitor policy article A52464.
Ask the insurer to explain any difference in your responsibility and the process for a model change. This website supports individual insurance equipment requests. MedraxDME is an out of network supplier and reviews insurance requests individually. A comparison can help prepare that conversation, but only the actual plan and fulfillment review can clarify your available route.
Make a personal comparison worksheet
Instead of choosing from a headline, make a short worksheet with the exact model names in separate columns. Under each one, record the clinician's recommendation, intended wear period, supported display, any pump compatibility requirement, training contact and confirmed insurance route. Leave unknown answers blank until the appropriate person confirms them.
Include daily practical questions. Who will help if the phone is replaced? Where are the current instructions stored? Which organization handles a device problem and which handles a routine refill? How will you remember the next supply discussion? These questions are useful because they turn a specification comparison into a workable support plan.
A blank answer is a signal to ask a question, not a reason to assume that both products work identically. If two products appear equally suitable, ask the clinical team which differences matter for your treatment and abilities. Do not use a website chart to overrule a prescription or to infer that a newer product is automatically better.
Changing systems without losing track of responsibilities
Before a transition, confirm whether you need a new prescription, new authorization, different reader, changed consumables or additional training. Ask the current and proposed dispensing organizations how to avoid duplicate requests. Keep a record of what has been confirmed instead of treating a submitted form as an approved order.
If supplies are running short, contact your care team and current dispensing organization promptly. Do not discontinue a working arrangement before a new one is confirmed. The manufacturer support process for a failed sensor is different from the insurance process for switching brands or replenishing routine supplies.
The MedraxDME diabetes catalog lets you review product information, and the callback form lets you request a discussion. Do not upload clinical records, device screenshots containing health information or insurance identifiers to that public form. The team can explain appropriate next steps after making contact.
Questions and answers
Which CGM is best?
The best fit depends on the prescribed treatment, approved age, supported display, possible pump integration, training needs and insurance access. Your clinician should guide the choice.
Are Libre 3 and Libre 3 Plus interchangeable names?
No. They identify different sensors. Use the exact name on the prescription, package and current manufacturer instructions.
Can I switch a connected pump to another sensor myself?
Do not assume compatibility or change a prescribed system based on a comparison page. Confirm the complete combination and training with your prescribing team.
Sources and updates
- Abbott: FreeStyle Libre 3 system information
- Abbott: FreeStyle Libre 3 Plus getting started guide
- Abbott: Current United States Libre 3 reader manual
- Dexcom: G7 15 Day and G7 differences
- Dexcom: Sensor wear duration and approved sites
- Dexcom: Healthcare professional product FAQs
- Insulet: Omnipod 5 sensor integrations
- Insulet: Omnipod 5 device compatibility
- Insulet: Sensor compatibility and Pod variants
- CMS: Glucose Monitor policy article A52464
- Medicare: Continuous glucose monitor coverage
Read our editorial and correction policy. For current plan rules, check the applicable official policy and contact your plan. Tell us about a correction.