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Sensor; invasive (e.g., subcutaneous), disposable, for use with interstitial continuous glucose monitoring system, one unit = 1 day supply

HCPCS code

HCPCS Procedure: Sensor; Invasive (e.g., Subcutaneous), Disposable, for Use with Interstitial Continuous Glucose Monitoring System (A9276)

Name of the Procedure:

Common Name(s): Continuous Glucose Monitor Sensor, CGM Sensor
Technical/Medical Terms: Interstitial Continuous Glucose Monitoring (iCGM) Sensor, Invasive Glucose Sensor


In layman's terms, this procedure involves the use of a small, disposable sensor that is inserted under the skin to continuously monitor glucose levels in people with diabetes. The sensor measures glucose in the interstitial fluid (fluid between cells) and provides real-time data to help manage blood sugar levels effectively.


Medical Conditions/Problems Addressed:

  • Diabetes Mellitus (Type 1 and Type 2)

Goals/Expected Outcomes:

  • Continuous monitoring and management of blood glucose levels
  • Reducing the risk of hypoglycemia and hyperglycemia
  • Enhancing diabetes management and improving overall health outcomes


Specific Symptoms or Conditions:

  • In patients with diabetes who require tight glucose control
  • Frequent monitoring of blood glucose levels

Patient Criteria:

  • Individuals with Type 1 or Type 2 Diabetes
  • Patients who experience frequent blood sugar fluctuations
  • Candidates for intensive insulin therapy


Pre-procedure Instructions:

  • Clean the insertion site with alcohol
  • Ensure the skin is dry before insertion
  • No special fasting or medication adjustments unless otherwise instructed by the healthcare provider

Diagnostic Tests or Assessments:

  • Blood glucose level check
  • Review of patient’s diabetes management plan

Procedure Description

  1. Insertion Site Selection: The healthcare provider selects an appropriate site, commonly on the abdomen or the upper arm.
  2. Sterilization: The area is cleaned and sterilized to prevent infection.
  3. Insertion: The sensor is inserted subcutaneously using a small needle or applicator device. The needle is removed, leaving the sensor under the skin.
  4. Attachment: The sensor is secured with an adhesive patch.
  5. Activation: The sensor is connected to the continuous glucose monitoring device, and the monitoring system is activated.


  • CGM sensor device
  • Applicator/Inserter
  • Adhesive patch
  • Alcohol wipes


  • Typically not required


The entire process of inserting and activating the sensor typically takes about 10-15 minutes.


This procedure is usually performed in an outpatient clinic, diabetes care center, or at home.


Healthcare Professionals Involved:

  • Diabetes Educator
  • Nurse
  • Registered Dietitian (occasionally for detailed management plans)
  • The patient or caregiver (if performed at home)

Risks and Complications

Common Risks:

  • Skin irritation or rash at the insertion site
  • Mild pain or bruising

Rare Risks:

  • Infection at the insertion site
  • Sensor malfunction or inaccuracies

Management of Complications:

  • Remove the sensor if severe irritation or infection occurs
  • Seek medical advice if experiencing persistent pain or unusual symptoms


Expected Benefits:

  • Continuous, real-time glucose monitoring
  • Better glucose control leading to reduced risks of long-term complications
  • Immediate feedback to adjust diet, exercise, and medication

Realization Timeline:

  • Benefits are realized almost immediately with improved glucose data and management


Post-Procedure Care:

  • Keep the insertion site clean and dry
  • Replace the sensor every 3-14 days (depending on the manufacturer's guidelines)

Expected Recovery Time:

  • Minimal to no recovery time required

Restrictions or Follow-up:

  • Regular follow-up with a healthcare provider to assess diabetes management


Other Treatment Options:

  • Traditional Fingerstick Blood Glucose Monitoring
  • Flash Glucose Monitoring

Pros and Cons:

  • CGM Sensors: Provide continuous data, can alert to high or low levels, but may be more expensive.
  • Traditional Monitoring: Less costly, but provides only intermittent readings, which may miss glucose fluctuations.

Patient Experience

During the Procedure:

  • Minimal discomfort during insertion, similar to a standard injection

After the Procedure:

  • Mild irritation at the insertion site which typically subsides within a few hours

Pain Management and Comfort:

  • Use over-the-counter pain relief if necessary
  • Apply cool compresses to alleviate any local discomfort

Medical Policies and Guidelines for Sensor; invasive (e.g., subcutaneous), disposable, for use with interstitial continuous glucose monitoring system, one unit = 1 day supply

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