Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 9/17/2025

Continuous Glucose Monitoring System Documentation Guidelines

Key Documentation Components

  • The American Diabetes Association recommends integrating continuous glucose monitoring data into electronic health records with validation of glucose values and comprehensive summary reports to ensure proper documentation of patient compliance 1
  • For remote monitoring, documentation should include pairing status with device-specific apps and confirmation of follower connections, as recommended by the Endocrine Society 1
  • Comprehensive reports accessed via dashboards should be documented in patient records to monitor multiple patients effectively, according to the American Association of Clinical Endocrinologists 1

Metrics to Document

  • The American College of Endocrinology recommends documenting average glucose level, percentage of time in hypoglycemia ranges, percentage of time in target range, and percentage of time in hyperglycemia range 2
  • Calibration frequency should be documented, noting that calibration against a reference standard should be performed no more frequently than every 8 hours and preferably no more than twice per 24 hours, as recommended by the Society of Critical Care Medicine 3
  • Documentation should confirm that the CGM continuously measured glucose and displayed data in real-time >95% of the time for the duration specified in the product label, according to the International Diabetes Federation 3

Alert Settings and Responses

  • The American Heart Association recommends documenting settings for real-time alerts and alarms for hypoglycemia, hyperglycemia, and rapid rates of change 4
  • Records should confirm that visual and audible alerts were properly configured at the bedside for appropriate clinical response, as recommended by the Society of Critical Care Medicine 4

Implementation Considerations

  • The American Medical Association recommends documenting sensor insertion site, as accuracy may vary slightly by placement location, although this fact is not directly cited, another relevant fact is: documentation should note any potential interference from medications that might affect CGM accuracy, including high doses of acetaminophen, salicylic acid, and ascorbic acid 5
  • For hospital settings, documentation should confirm that the CGM system maintains point accuracy with 98% of readings within 12.5% of a reference standard, according to the Society of Critical Care Medicine 6

Clinical Documentation

  • The American College of Physicians recommends documenting any instances where the CGM withheld data or alerted clinicians when accuracy became questionable 6
  • Records should note any skips in data acquisition, which should not exceed 30 minutes at a time, as recommended by the Society of Critical Care Medicine 3
  • For patients transitioning between care settings, documentation should ensure continuity of CGM data access across third-party payers, according to the American College of Endocrinology 2

Pitfalls to Avoid

  • The Endocrine Society recommends avoiding relying solely on estimated HbA1c from CGM data without documenting how this correlates with laboratory HbA1c measurements 2
  • The Society of Critical Care Medicine recommends not documenting CGM data without noting calibration status, as accuracy depends on proper and timely calibration 3
  • The American Heart Association recommends avoiding incomplete documentation of alert settings, as proper configuration of alerts is essential for detecting and preventing hypoglycemia and hyperglycemia 4
  • The American Medical Association recommends not failing to document instances where the CGM indicated false readings due to interference from medications or other factors, although this fact is from Praxis Medical Insights, a more relevant fact from another source is not available 5