Guidelines for Sharing Cgm Data During Remote Telehealth Consultations

The Growing Role of Telehealth in Diabetes Management

Telehealth has fundamentally reshaped how chronic conditions like diabetes are managed, offering patients greater flexibility and reducing the need for in-person visits. For individuals using Continuous Glucose Monitoring (CGM) systems, remote consultations have become a critical touchpoint for reviewing glucose trends, adjusting therapy, and preventing complications. However, the effectiveness of these virtual visits depends heavily on how well CGM data is prepared, transmitted, and interpreted. Clear guidelines for sharing this data help patients and providers maximize the value of remote care while maintaining security and regulatory compliance.

This article provides a detailed framework for sharing CGM data during telehealth consultations, covering device preparation, secure transmission methods, best practices for both patients and clinicians, and common pitfalls to avoid. Whether you are new to CGM technology or looking to refine your telehealth workflow, these recommendations support more productive, data-driven diabetes management.

CGM devices continuously measure interstitial glucose levels, generating a wealth of time-stamped readings, trend arrows, and summary reports. The most common output formats include:

Ambulatory Glucose Profile (AGP): A standardized report showing glucose patterns over a set period, typically 7, 14, or 30 days. It includes time in range (TIR), hypoglycemia/hyperglycemia percentages, and glucose variability metrics.
Trend Arrows: Real-time indicators of the direction and speed of glucose change, helping predict near-term excursions.
Daily Logs: Full glucose traces with time stamps, often annotated with meals, exercise, and insulin doses.

Different CGM systems have unique data-sharing ecosystems. The three most widely used in the United States are Dexcom (G6, G7), Abbott Freestyle Libre (2, 3), and Medtronic Guardian (3, 4). Each offers cloud-based platforms—Dexcom Clarity, LibreView, and CareLink respectively—that generate shareable reports. Understanding the specific capabilities of your device is the first step toward effective telehealth data sharing.

Preparing CGM Data for a Telehealth Appointment

Thorough preparation ensures that the data your provider sees is complete, accurate, and actionable. Below are essential steps patients should take before a virtual visit.

Confirm Device Functionality and Syncing

Before the appointment, verify that your CGM system has been transmitting data consistently. Common checks include:

Ensure the sensor is within its wear period and not due for replacement.
Confirm that the transmitter (for Dexcom) or reader/smartphone app has been syncing data to the cloud without interruptions.
Check battery levels on your smartphone or handheld receiver, as a dead battery can prevent data upload.
If using a smartwatch integration, verify that the watch app is receiving glucose data.

Most CGM apps display the last time data was uploaded. If it has been more than a few hours, troubleshoot the connection before the telehealth session begins. Device manuals or manufacturer support pages (e.g., Dexcom Clarity support) provide step-by-step syncing guides.

Curate the Right Data Window

Healthcare providers typically prefer a 14-day window of CGM data for trend analysis, though 7- or 30-day windows can be useful for specific questions. Here is how to prepare:

Focus on the most recent 14 days unless the appointment is intended to review a longer time frame.
If you changed sensors or had a gap in data, note the exact dates so the provider can discount unreliable periods.
Before the visit, review your own glucose patterns and write down any notable events—a severe low, an unexplained high after a specific meal, or a consistent overnight pattern.

Sharing too little data (e.g., only a few hours or days) limits the provider’s ability to identify trends, while sharing too much (months of data) can overwhelm the consultation. The 14-day standard strikes an effective balance.

Keep a Context Diary

CGM data tells the what but not always the why. A simple log tracking meals (carbohydrates and timing), physical activity, insulin doses, and emotional stress can transform raw numbers into actionable insights. Many CGM apps allow you to add notes directly to the glucose graph, but a separate paper or digital diary ensures nothing is forgotten. Share this diary with your provider during the consultation, either by uploading it with the data or verbally summarizing key correlations. This context is especially valuable for troubleshooting recurrent hyperglycemia or hypoglycemia.

Secure Data Transmission: Privacy and Compliance

When sharing CGM data remotely, security is paramount. diabetes-specific health information is protected under the Health Insurance Portability and Accountability Act (HIPAA) in the United States. Both patients and providers must take steps to ensure data is transmitted and stored securely.

Avoid Unsecure Communication Channels

Standard email, SMS text messages, and consumer-grade messaging apps (e.g., personal WhatsApp or Facebook Messenger) are generally not HIPAA-compliant and should not be used to send CGM data files or screenshots containing patient identifiers. Instead, use one of the following:

HIPAA-compliant telehealth platforms that support encrypted file uploads or real-time data sharing (e.g., Zoom for Healthcare, Doxy.me, Updox).
Direct integration with cloud portals that your provider can access securely (e.g., inviting your clinician to view your Dexcom Clarity profile).
Encrypted patient portals offered by many healthcare systems (e.g., MyChart, FollowMyHealth), which allow file attachments.

Providers should clearly communicate which transmission method they prefer and guide patients on how to use it. For example, a clinic might provide written instructions for using LibreView’s “Share with HCP” feature or how to grant temporary access to a Dexcom Clarity clinic account.

Patient Responsibilities for Data Security

Patients also play a role in protecting their own data. Key practices include:

Using strong, unique passwords for your CGM system account and health portal.
Not sharing login credentials with family members or caretakers unless you intentionally want them to have access, and even then, use the authorized sharing features built into the system.
Logging out of shared computers or devices after uploading data.
Revoking access to your CGM data after the telehealth visit if you no longer want the provider to have ongoing visibility.

For more details, the HHS HIPAA Privacy Rule page outlines your rights and responsibilities regarding protected health information.

Provider Responsibilities and Record-Keeping

Clinicians must ensure that patient CGM data is stored within their electronic health record (EHR) system or a compliant cloud service, not on personal devices. If a patient shares data via screen sharing during a live session, the provider should download and attach the report to the patient’s chart immediately after the visit. Many CGM reports can be exported as PDFs from apps such as Dexcom Clarity, LibreView, or CareLink. Providers should also verify that their telehealth platform’s recording feature is turned off if they do not wish to capture the data sharing session in a video record—some platforms automatically record all screen sharing, which may create an unnecessary duplicate of protected information.

There are three primary approaches to presenting CGM data during a remote consultation. Each has advantages and is suited to different clinical scenarios. Patients should coordinate with their provider in advance to choose the best method.

Most modern CGM systems allow patients to generate a secure, time-limited web link that displays their glucose data in real time. For example:

Dexcom: The Dexcom G6 and G7 apps can create a “Share” link that a provider can view on any browser. The patient sets a data expiration (e.g., 24 hours) and can revoke access at any time.
Abbott Freestyle Libre: LibreView allows patients to invite a provider to their profile, granting read-only access to reports for a defined period.
Medtronic: CareLink offers similar invite-based sharing for Guardian system users.

Pros: No file transfer needed; data updates continuously; provider can see the most recent readings alongside historical trends.

Cons: Requires the patient to have created an account and be comfortable with the sharing workflow. Some patients may not have the app configured for sharing.

Method 2: Uploading Data Files to the Telehealth Platform

Patients can manually export a CGM report (typically as a PDF or CSV) and upload it to the telehealth appointment’s file-sharing feature. This is often done through the patient portal or directly into a secure chat window during the visit.

Steps for common devices:

Open the device’s data management app (e.g., Dexcom Clarity, LibreView, CareLink).
Select the desired time range (usually 14 days).
Generate the report and save it as a PDF to your device.
During the telehealth session, use the platform’s “upload file” or “share screen” option to present the PDF to your provider.

Pros: Works even if the provider does not have access to the patient’s CGM cloud account; the report remains static and can be stored directly in the EHR.

Cons: The PDF is only a snapshot—if the patient and provider discuss changing a therapy and want to see recent data after the appointment, they must rely on the next report. Also, CSV files may need formatting in some EHRs.

Patients can share their smartphone or computer screen during the video call, showing the CGM app’s main screen, trend graph, or daily logs. This method is ideal for real-time troubleshooting or when the patient and provider want to walk through data together.

Important considerations:

Ensure the screen is clean and that only the CGM app is visible—close other windows to avoid accidentally sharing personal information.
Turn off notifications on the device that might interrupt the conversation.
If using a smartphone, hold the device steady or use a stand to prevent motion blur on the screen.

Pros: Very interactive; the provider can ask, “What happened around 2:00 PM yesterday?” and the patient can zoom in on that exact time stamp in real time.

Cons: Screen sharing can be bandwidth-intensive. Poor internet connections may cause lag or low resolution, making small glucose numbers hard to read. Also, the provider cannot easily capture the data for the record unless they take a screenshot (with patient consent).

To turn CGM data into better diabetes management outcomes, both patients and providers should adopt a structured approach during the telehealth visit. Below are strategies for maximizing the value of the shared data.

For Patients: Come Prepared to Discuss the Story Behind the Numbers

Review your data before the call: Identify two or three key patterns you want to discuss. For example, “I notice my glucose spikes after breakfast every day” or “I have a low every night around 3 AM.”
Have your context diary ready: Mention meals, exercise, and stress events that coincide with glucose fluctuations. This helps the provider suggest specific adjustments.
Prepare specific questions: Is it time to adjust my insulin-to-carb ratio? Should I change the time I take my long-acting insulin? What can I do to reduce early morning highs?
Confirm the next steps: Before ending the call, ask your provider what changes they recommend and when to follow up. Write down the plan.

For Providers: A Systematic Review Process

Start with the AGP: Review the Ambulatory Glucose Profile for an overall picture. Focus on time in range (TIR), time below range (hypoglycemia), and time above range (hyperglycemia). The current consensus is to aim for >70% TIR for most adults with type 1 or type 2 diabetes.
Identify patterns by time of day: Look at overnight, post-meal, and exercise periods separately. Use the daily trends to confirm or refute the patient’s subjective observations.
Correlate with medications and lifestyle: Cross-reference glucose data with insulin doses, meal timing, and physical activity logs. Pattern identification is the foundation of therapy adjustments.
Prioritize safety: If the patient has frequent or severe hypoglycemia, address that first before optimizing time in range. Immediate changes might include reducing insulin doses or adjusting carb ratios.
Document the data and plan: Save the CGM report in the patient’s chart, write a brief summary of the data review, and specify the agreed-upon therapeutic changes. Some EHRs support directly importing CGM reports from cloud platforms.

Avoiding Common Pitfalls

Even with good preparation, telehealth CGM consultations can miss the mark. Here are common challenges and how to address them:

Outdated data: The patient may have synced their device a week ago, so the provider is reviewing stale data. Solution: Instruct patients to sync within 2 hours of the appointment, and have them do it while on the call if needed.
Screen sharing too small to read: On a phone, glucose trend lines can appear minuscule on a provider’s end. Solution: Ask the patient to zoom in on relevant portions or to share a tablet if available.
Provider not familiar with the patient’s CGM report format: Different devices have slightly different color schemes and metrics. Solution: The provider should ask the patient to point out the legend or time scale. Alternatively, providers can request that patients upload the standardized AGP PDF, which is more consistent across platforms.
Technical glitches with share links: The patient may inadvertently set the expiration too short, causing the provider to get an error. Solution: Provide clear instructions on how to create a link with a 24-hour expiration, and have the patient test the link in advance.

Legal and Regulatory Considerations

Telehealth consultations involving CGM data must comply with HIPAA as well as state-specific telemedicine laws. Key points include:

Data residency: Ensure that the CGM data stored on cloud servers (e.g., Dexcom Clarity, LibreView) is hosted in a manner compliant with jurisdictional requirements. Most major vendors are HIPAA-compliant and sign Business Associate Agreements (BAAs).
Consent: Patients should consent to the method of data sharing. Some platforms require explicit consent before granting a provider access to real-time data.
Cross-state licensing: If the provider is in a different state than the patient, verify that the provider holds a valid license or is covered by interstate compacts for telehealth.

For further reading, the CDC’s Telehealth and Diabetes page offers additional resources on integrating telemedicine into diabetes care.

Even with careful preparation, technical issues can arise. Below are quick fixes for frequent problems.

Common Issues and Solutions
Problem	Likely Cause	Solution
Data has not uploaded to the cloud	Transmitter out of range from phone; cellular/Wi-Fi off; low battery	Place phone near transmitter, charge devices, ensure internet connection
Share link is not working	Link expired; patient revoked access; incorrect email	Generate a new link and re-invite the provider
Screen sharing is pixelated	Low bandwidth; many apps running	Pause video momentarily, close other apps, or switch to file upload
Provider cannot open PDF report	Corrupted file; incompatible viewer	Save PDF as a new file and re-upload; try a different browser

If an issue persists, consult the device’s official support pages: Dexcom Clarity, Freestyle LibreView, or Medtronic CareLink.

Looking Ahead: The Future of CGM Data in Telehealth

The integration of CGM data into telehealth is poised to become even more seamless. Emerging trends include:

Interoperability standards: Initiatives like the Diabetes Device Integration (DDI) project and FHIR (Fast Healthcare Interoperability Resources) are working to standardize the format of CGM data so it flows directly into EHRs without requiring manual upload or PDF conversion.
Artificial intelligence (AI) pattern recognition: Algorithms that automatically identify clinically significant patterns (e.g., pre-meal hyperglycemia or nocturnal hypoglycemia) will help providers focus on the most impactful changes, even when the consultation time is limited.
Remote patient monitoring (RPM): More clinics are adopting RPM programs where CGM data is reviewed asynchronously, reducing the need for frequent live visits. Patients still benefit from periodic telehealth check-ins to adjust therapy based on the data.
Wearable ecosystem integration: Connecting CGM data with fitness trackers, insulin pumps, and smart pens will provide a comprehensive picture of diabetes management that can be reviewed during telehealth visits.

Staying informed about these developments helps patients and providers alike anticipate changes and continue to optimize remote diabetes care. The core principle remains: clear, secure, and collaborative sharing of CGM data enhances decision-making and empowers patients to manage their condition more effectively between visits.

By following the guidelines in this article—preparing data carefully, using secure transmission methods, choosing the right sharing approach, and engaging in structured discussions—telehealth consultations can move beyond simple check-ins to become powerful, data-driven sessions that improve glycemic outcomes and quality of life for people living with diabetes.