AMA CPT® Assistant - 2009 Issue 12 (December)
Continuous Glucose Monitoring (December 2009)
December 2009 pages 6-8 Continuous Glucose Monitoring Continuous Glucose Monitoring (CGM) provides ongoing monitoring and recording of blood glucose levels by continuous measurement of interstitial fluid glucose levels. Some CGM systems provide real-time information, while others require that data be downloaded and retrospectively reviewed. The term CGM has evolved to include all CGM products from various manufacturers which have come to market. CGM also refers to both the professional-use of a diagnostic test device, and long-term personal use in which the patient owns their device. CGM is indicated for patients with type Type 1, Type 2, or Gestational Diabetes...
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Article Overview
This article explains continuous glucose monitoring from both a clinical and coding perspective, with emphasis on the types of FDA-approved devices available at the time and the CPT guidance associated with their use. It is useful for physicians, coders, billing staff, and diabetes care practices that need to understand how the service was documented, reviewed, and discussed in 2009 payer and CPT contexts. The article also addresses common workflow questions, remote data review, and coverage considerations.
Why This Topic Matters
Continuous glucose monitoring was an evolving service in 2009, and the article clarifies how the technology and coding guidance aligned at that time. That makes it important for understanding historical CPT policy, documentation expectations, and payer-facing workflow for CGM services.
Article Sections
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Continuous Glucose Monitoring
Introduces CGM, its general purpose, device components, and the broad patient groups for whom it may be considered. It also summarizes the major categories of FDA-approved systems available at the time.
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Table 1: FDA-Approved CGM Devices
Provides an overview of the CGM devices referenced in the article and distinguishes between professional-use and patient-use categories.
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CPT coding guidance for CGM services
Discusses the CPT framework associated with CGM services, including the relevant billing structure, revision context, and related guideline issues.
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Current Guidelines for CGM
Summarizes payer and coverage-related considerations and notes how reporting guidance may differ from insurer policies.
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Data Review
Explains how CGM data review may occur when information is transmitted or reviewed away from the office setting. It also addresses the relationship between remote data review and the professional service described in the article.
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Typical Clinical Situations
Describes common office and training workflows for professional-use and patient-use CGM services. It presents typical steps involved in setup, collection, download, and reporting.
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Insurance Coverage for CGM
Addresses verification of coverage and the variability of payer requirements for professional and personal CGM use.
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Commonly Asked Questions
Presents frequently asked billing questions about CGM reporting, ownership of devices, and remote interpretation in practical office scenarios.
What You Will Learn
- How CGM was described and categorized in 2009
- Which FDA-approved CGM device types were discussed
- What CPT guidance was associated with CGM services
- How payer and coverage considerations were framed
- What office workflow issues were commonly raised for CGM billing
Who Should Read This
- Medical coders
- Billing staff
- Physicians
- Nurse practitioners
- Physician assistants
- Diabetes educators
- Practice administrators
Codes Discussed
Modifiers Discussed
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