HCPCS Code A9276: Sensor, Invasive (e.g., Subcutaneous), Disposable, for Use with Interstitial Continuous Glucose Monitoring System, One Unit = 1 Day Supply

Learn about HCPCS A9276 for CGM sensors, billing, supply allowance, coding practices, Medicare coverage, and diabetes treatment compliance.

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## **What is HCPCS A9276?** HCPCS code A9276 refers to a “Sensor; invasive (e.g., subcutaneous), disposable, for use with non-durable medical equipment interstitial continuous glucose monitoring system.” Each unit of this code represents a 1-day supply of the sensor used in continuous glucose monitoring (CGM) systems. These CGM devices are inserted subcutaneously and allow patients—especially those with diabetes—to monitor glucose levels continuously. The sensor’s invasive, disposable design is key to accurate CGM data collection and interpretation. This code is part of the miscellaneous supplies and medical equipment category for interstitial continuous glucose monitoring, maintained by the Centers for Medicare & Medicaid Services (CMS). It plays an important role in billing and coding practices by specifying the daily supply allowance for CGM sensors, which is critical for accurate claims processing and reimbursement. The designation “one unit = one day supply” means providers bill per day of sensor use, even if the manufacturer’s recommended sensor lifespan is longer. As of April 1, 2022, Medicare no longer covers A9276, and claims submitted with this code are denied as non-covered. The code remains active and may still be accepted by non-Medicare payers. For Medicare beneficiaries, suppliers must use the updated CGM supply allowance codes—A4238 (adjunctive CGM supplies) or A4239 (non-adjunctive CGM supplies) along with the appropriate device code (E2102 or E2103) to ensure payment. Billers should carefully review payer guidelines and use proper CPT code pairings, maintain documentation for medical necessity, and provide additional information, such as CGM data usage and interpretation details, when required.

## **HCPCS code A9276 documentation and billing note** HCPCS code A9276 is no longer covered by Medicare for dates of service on or after April 1, 2022, and claims using this code are denied as non-covered. For Medicare beneficiaries, suppliers must use A4238 (adjunctive CGM supplies) or A4239 (non-adjunctive CGM supplies) with the appropriate device code (E2102 or E2103) to ensure reimbursement. For commercial or Medicaid payers that still accept A9276, providers should include a valid prescription, medical necessity documentation (e.g., diabetes diagnosis), and details such as the number of days supplied and the type of CGM system. Claims should reflect one unit per day of sensor use and comply with payer-specific rules. Including additional information like CGM data interpretation or clinical notes may be required for prior authorization or audit purposes.

## **Other relevant codes** - **A4238** - Supply allowance for adjunctive, non-implanted continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service - **A4239** - Supply allowance for non-adjunctive, non-implanted continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service