When your healthcare provider mentions a continuous glucose monitor (CGM), it's easy to picture a small sensor and an app. But starting a CGM involves more than that.
You may wonder what the readings mean, how alerts work, whether the sensor will be comfortable, and if your phone will connect. Then there are supplies, insurance, and knowing who to call.
Asking questions before you start can clarify what to expect, help you understand your specific device, and prepare you for training. It can also make ordering and refills easier to follow and help you know where future questions should go.
At Medicap Home Medical, formerly NuCara Home Medical, we help people across Iowa with continuous glucose monitor equipment and supplies. The device you use may depend on your clinical needs, prescription, insurance, compatibility, and availability. Think of this list as a guide for your conversations, not a shopping list.
What Questions Should I Ask Before Starting a CGM?
Questions to ask before starting a CGM include why it’s being recommended, which device your care team is considering, whether it works with your phone or requires a receiver, what training you’ll receive, and how alerts work. You’ll also want to ask when a finger-stick check may be needed, how the sensor fits into daily activities, how supplies and refills work, what your insurance plan covers, and who to call for help.
What Does a CGM Do?
A CGM uses a small sensor to estimate glucose in the fluid between your cells, called interstitial fluid. Depending on the system, that information may be sent to a phone app, a separate receiver, or another compatible device. Many CGMs display current readings, trends, and alerts.
For a plain-language overview, see this guide to continuous glucose monitoring.
Components and features vary by brand and model. A CGM provides information, but treatment decisions should follow your individual care plan and the instructions for your specific device.
1. Why Are You Recommending a CGM for Me?
Knowing the reason behind the recommendation helps the data feel more purposeful. Think about asking:
What do you hope the CGM will help us monitor?
Will I use it short term or longer term?
What information do you want to review?
How and when will we follow up?
Your diabetes care team should explain why a CGM is being considered and how it fits into your treatment plan.
2. Which CGM System Are We Considering and Why?
CGM systems differ in their sensors, apps, receivers, wear periods, alerts, and compatibility requirements. Your options may also depend on your clinical needs, insurance, prescription, technology, and availability.
Online comparisons can't account for your health history, device compatibility, or insurance coverage, so it's best not to choose a device based on one alone. Ask why a particular system fits your needs.
The CDC's overview of continuous glucose monitors offers a helpful intro to how CGMs work and how they fit into diabetes care. Otherwise, our team at Medicap can help answer questions about your device!
Contact Medicap for CGM Help Today
3. Will I Use a Phone, Receiver, or Another Device?
Compatibility varies, so ask:
Are my phone and operating system compatible?
Do I need a separate receiver?
What are my options if I don't use a smartphone?
Could phone or app updates affect compatibility?
Do I need Bluetooth, internet access, or an online account?
Compatibility lists change, so check yours against the manufacturer's current documentation.
If a family member helps you with technology, invite them into this conversation.
4. What Training Will I Receive?
CGM training topics that may be covered typically include sensor placement, insertion, pairing, trend information, troubleshooting, alerts, skin reactions, and sharing data with caregivers and healthcare providers.
Ask whether your training will cover:
Sensor placement and insertion
Pairing and setup
Alert settings and trend arrows
Replacing the sensor
Sharing reports with your care team
Basic troubleshooting
What to do when a reading doesn’t match how you feel
When a finger-stick check may be needed
It’s also fair to ask who provides the training and whether a caregiver or family member can join.
Have Questions About CGM Equipment?
Medicap can explain our CGM equipment and supply process.
Explore Continuous Glucose Monitors | Find a Medicap Home Medical Location
5. What Will the Alerts Mean?
Alert availability, settings, sounds, and notification options vary by device. Ask:
Which alerts will be active?
Are any alerts specific to my device?
How do you want me to respond when an alert goes off?
What should I do about repeated or overnight alerts?
Could phone settings, such as silent mode or battery saver, affect alerts?
Which settings shouldn’t I change without talking to you first?
Don’t assume alert settings or response instructions are the same across CGM systems. Follow the care plan your diabetes team provides and the instructions for your specific device.
6. Will I Still Need Finger-Stick Checks?
The answer depends on your system, circumstances, symptoms, and care plan. Some situations may call for confirming a reading with a blood glucose meter.
CGM and meter readings can differ because they measure glucose differently. A CGM estimates glucose in the fluid between cells, while a meter checks a drop of blood. Ask your care team when a meter check makes sense for you, and follow your device instructions.
Ask your diabetes care team when a finger-stick check may be needed, especially if a reading doesn’t match how you feel.
7. Where Can I Wear the Sensor and What Daily Activities Are Allowed?
Each manufacturer and device has its own approved instructions, so ask about:
Approved sensor sites
Bathing, swimming, and exercise
Sleeping with the sensor
Adhesion and skin sensitivity
Travel
Medical procedures
When the sensor needs to be removed or protected
Don’t rely on another person’s instructions simply because they also use a CGM. Approved sites, water guidance, wear periods, and medical-procedure instructions can differ by device.
8. How Often Will I Need New Sensors or Other Supplies?
Planning ahead may help you avoid gaps between sensors. Ask:
How long is each sensor designed to be worn?
Does my system use a separate transmitter that needs replacing?
What’s the refill schedule, and how far ahead should I reorder?
How should I store supplies?
Should I plan backup supplies for travel?
What should I do if a sensor fails or comes loose?
Who handles manufacturer replacements?
Replacement eligibility and timelines depend on the manufacturer, device, insurance plan, and supplier. Current Medicap customers can request CGM supply refills online.
9. What Should I Ask About Insurance and Cost?
Coverage varies, so contact your insurance plan before you start. Verify:
Whether the device and supplier are in network
Prescription and documentation requirements
Whether prior authorization, or advance approval from the plan, is required
Your deductible, coinsurance, or copay
Refill timing
Preferred brands
Whether CGMs fall under your pharmacy benefit or medical equipment benefit
What happens if your coverage changes
If you have Medicare, confirm current requirements directly with Medicare, your Medicare plan, and your supplier.
Planning Ahead for CGM Supplies?
Medicap can answer equipment and supply questions and explain its ordering and refill process.
Get Help With CGM Equipment and Supplies | Refill CGM Supplies
10. How Will My Data Be Shared?
Data sharing depends on the CGM system, clinic, app, and account settings. Ask:
Is my data shared automatically?
Which app, portal, or account will I use?
Can a caregiver receive my data?
Who reviews it, and when will we follow up?
Who has access to my account, and how is my privacy protected?
Should I bring reports to appointments?
Some CGM systems can send information to a smartphone, receiver, insulin pump, or another person’s compatible device. The exact setup depends on the system.
11. Who Should I Call When I Have a Question?
Your Diabetes Care Team
Contact your diabetes care team for questions about your readings, symptoms, glucose targets, medications or insulin, treatment decisions, interpreting trends, responding to alerts, and whether a CGM is appropriate for you.
Your Equipment Provider
Contact your equipment provider for questions about ordering, supplies, eligible refills, equipment-related questions within their scope, replacement-supply processes, and help finding the right resource.
The Device Manufacturer
Contact the device manufacturer for technical problems, app or connection issues, product support, sensor failures, and warranty or manufacturer replacement procedures.
Local Support for CGM Equipment and Supplies
Medicap supports CGM users throughout Iowa with equipment, supply ordering, and refills.
When you call, you'll speak with a representative from your local community. Our team works with healthcare and insurance providers to determine coverage and handle billing, and supplies you need regularly can be delivered to your door. We're contracted with Medicare and Medicaid and accept most private insurance plans.
We can also help you understand the equipment process and direct you to your care team or manufacturer when a question falls outside our role. Learn more about CGM services from Medicap, or explore our home medical equipment services.
Get Ready for a More Informed CGM Conversation
Save this list and bring it to your next care appointment. Confirm coverage with your insurance plan, review the instructions for your specific device, and contact Medicap with equipment or supply questions.
Explore Continuous Glucose Monitors
Find a Medicap Home Medical Location
A CGM provides information that can support diabetes management, but treatment decisions should follow the guidance provided by your diabetes care team and the instructions for your specific device. Contact your healthcare provider about readings, symptoms, medications, insulin, or your treatment plan. Contact your equipment provider or device manufacturer for equipment, technical, or supply support.
Questions People Ask Before Starting a CGM
How do I know if a CGM may be appropriate for me?
Your diabetes care team can help determine whether a CGM fits your health needs and treatment plan. Medicap can assist with equipment and supply questions after a CGM is prescribed or recommended.
Can I use a CGM without a smartphone?
Some systems work with a separate receiver or another compatible device. Check the manufacturer’s current compatibility information, and ask which setup is being considered for you.
Will I still need to check my glucose with a finger stick?
Possibly. It depends on your device, symptoms, circumstances, and care plan. Follow your CGM instructions, and ask your diabetes care team when meter confirmation may be needed.
Can I shower, exercise, and sleep while wearing a CGM?
Daily-use guidance varies by device. Check the manufacturer’s instructions for water exposure, exercise, sleeping, travel, and medical procedures.
How often are CGM sensors replaced?
Sensor wear time varies by brand and model. Confirm the replacement schedule in your device instructions, and ask your supplier when you’ll be eligible to order refills.
Does insurance cover continuous glucose monitoring?
Coverage depends on your insurance plan, prescription, documentation, benefit type, device, and supplier. Contact your plan and supplier to verify network status, prior authorization, costs, and refill requirements.
Who should I call with CGM questions?
Call your diabetes care team about readings, symptoms, and treatment. Contact your equipment provider about ordering, supplies, and refills. Contact the device manufacturer about product-specific technical, app, or sensor issues.