Authorized NYRx, Medicare & Medicaid DME Provider
How to Set Up a CGM: Complete Dexcom G7 and FreeStyle Libre 3 Plus Guide
What Is a Continuous Glucose Monitor
and Why Proper Setup Matters
A continuous glucose monitor (CGM) is a small wearable device that measures your blood sugar levels in real time throughout the day and night. Unlike traditional finger-stick tests, a CGM gives you constant data so you can better manage diabetes and avoid dangerous highs and lows.
Correct setup is essential for accurate readings, comfort, and long battery life. When done right, your CGM can improve your A1C, give you peace of mind, and qualify for full Medicare or NYRx Medicaid coverage in New York.
Choosing the Right CGM System for You
At Palma Care DME we supply two of the most advanced CGM systems covered by Medicare Part B and NYRx Medicaid in 2026: the Dexcom G7 and the FreeStyle Libre 3 Plus. Both are FDA-cleared, require no finger sticks for dosing decisions, and work with smartphone apps.
Dexcom G7 Overview
The Dexcom G7 features a 30-minute warm-up, 10-day sensor wear, and the smallest transmitter on the market. It is ideal for patients who want the most accurate real-time alerts.
FreeStyle Libre 3 Plus Overview
The FreeStyle Libre 3 Plus offers a 14-day sensor life, the smallest sensor size, and Bluetooth connectivity directly to your phone. It is a great choice for patients who prefer longer wear time and simpler setup.
Step-by-Step CGM Setup for Dexcom G7
Before you begin, wash your hands and choose a clean area on the back of your upper arm. Make sure you have your Dexcom G7 sensor, transmitter, and smartphone ready.
Step 1 – Prepare the Sensor
Open the sensor package. Remove the applicator from its sterile pouch.
Step 2 – Insert the Sensor
Place the applicator on the back of your upper arm and press firmly until you hear a click. Hold for 5 seconds, then gently pull the applicator straight away.
Step 3 – Attach the Transmitter
Snap the reusable transmitter into the sensor pod until it clicks. The transmitter will light up to confirm connection.
Step 4 – Pair with the Dexcom App
Open the Dexcom G7 app on your phone. Follow the on-screen prompts to pair the transmitter via Bluetooth. Your first reading will appear after the 30-minute warm-up period.
Step-by-Step CGM Setup for FreeStyle Libre 3 Plus
The FreeStyle Libre 3 Plus setup is even simpler and requires no separate transmitter.
Step 1 – Choose Your Site
Clean the back of your upper arm with an alcohol wipe and let it dry completely.
Step 2 – Apply the Sensor
Remove the sensor from its packaging. Place the applicator on your arm and press the button to insert the filament. Hold steady for 3 seconds.
Step 3 – Activate the Sensor
The sensor activates automatically. Open the Libre 3 app on your phone and scan the sensor with your phone’s NFC reader. The sensor will connect instantly.
Step 4 – Confirm First Reading
After the 60-minute warm-up, your first glucose reading will appear in the app. No finger-stick calibration is needed.
First 24 Hours After CGM Setup: What to Expect
Your first day with a CGM may show some variation while the sensor stabilizes. Stay hydrated, avoid heavy exercise on the insertion arm, and check readings against a finger-stick meter only if the app alerts you to do so.
Most patients notice improved accuracy within 12–24 hours. Keep the app open in the background and enable all safety alerts for low and high glucose.
Common CGM Setup Problems and Quick Fixes
Sensor Will Not Connect
Restart your phone’s Bluetooth and move within 20 feet of the sensor. Re-open the app and try pairing again.
Pain or Bleeding at Insertion Site
This is normal for the first few minutes. If pain lasts more than 10 minutes, remove the sensor and contact Palma Care DME for a replacement.
Inaccurate Readings
Wait the full warm-up period. If readings remain off after 24 hours, perform a finger-stick comparison and contact your supplier.
Medicare and NYRx Medicaid CGM Coverage in NYC
In 2026, Medicare Part B covers Dexcom G7 and FreeStyle Libre 3 Plus for patients who meet the criteria of using insulin or having a history of hypoglycemia. NYRx Medicaid follows similar guidelines with full coverage for eligible New York residents.
Palma Care DME is an authorized Medicare and NYRx supplier. We handle prior authorization, insurance verification, and 2-day delivery across all five boroughs and upstate New York.
Order Your CGM Setup Supplies Today
CGM Supplies Available Nationwide & Across New York State
Palma Care DME ships CGM supplies to every county in New York State and offers nationwide delivery for eligible Medicare patients. Order today and receive expert setup support no matter where you live.
Ready to start continuous glucose monitoring with professional support? Palma Care DME makes the entire process simple. Our team provides expert device setup education and ongoing supply management so you can focus on living well.