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    OpenPayerPolicy UpdatesEndocrinologyUnitedHealthcare CGM Coverage Update | OpenPayer
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    ModifiedUnitedHealthcarePolicy CS024IN.15

    Continuous Glucose Monitoring and Insulin Delivery for Managing Diabetes (for Indiana Only)

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    This policy governs coverage and medical-necessity requirements for continuous glucose monitors, insulin pumps, and related insulin-delivery technology for UnitedHealthcare Community Plan members in Indiana.

    Policy Summary
    PayerUnitedHealthcare
    PolicyContinuous Glucose Monitoring and Insulin Delivery for Managing Diabetes (for Indiana Only)
    Policy CodePolicy CS024IN.15
    Change TypeModified
    Effective DateOctober 1, 2026
    Next Review DateN/A
    Key ActionFor medical-necessity criteria for external insulin pumps, intensive insulin therapy, and nonimplantable CGM requests, refer to InterQual clinical criteria.
    SourceLink

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    POLICY UPDATE CHANGES

    External continuous subcutaneous insulin infusion pumps, including Omnipod, are described as proven and medically necessary in certain circumstances when used according to FDA-labeled indications, contraindications, warnings, and precautions.

    External continuous subcutaneous insulin infusion pumps are described as medically necessary for diabetes caused by conditions other than type 1, type 2, or gestational diabetes when intensive insulin therapy is required.

    IndianaState-specific application
    6 monthsInitial long-term CGM authorization
    12 monthsLong-term CGM reauthorization
    <54 mg/dLLevel 2 hypoglycemia threshold
    ≥3 times dailyIntensive insulin therapy

    Coverage Criteria

    External Insulin Pumps

    External continuous subcutaneous insulin infusion pumps, including Omnipod, are proven and medically necessary in certain circumstances when used according to U.S. Food and Drug Administration (FDA)-labeled indications, contraindications, warnings, and precautions. For medical necessity clinical coverage criteria, refer to the InterQual® CP: Durable Medical Equipment, Continuous Glucose Monitors, Insulin Pumps, and Automated Insulin Delivery Technology.

    ALL of the following

    • The external continuous subcutaneous insulin infusion pump is used according to its FDA-labeled indications, contraindications, warnings, and precautions.
    • The applicable InterQual® medical necessity clinical coverage criteria are met.

    External Pumps for Other Diabetes Causes

    External continuous subcutaneous insulin infusion pumps are medically necessary for managing individuals with diabetes due to causes other than type 1, type 2, or gestational diabetes when all of the following criteria are met.

    ALL of the following

    • The diabetes is due to a cause other than type 1, type 2, or gestational diabetes. Examples include cystic fibrosis-related diabetes, posttransplant diabetes, and diabetes following pancreatic surgery.
    • The individual requires intensive insulin therapy, defined as insulin treatment at least three times a day.≥ 3 times daily

    Short-Term Continuous Glucose Monitoring

    Short-term continuous glucose monitoring is covered when used by a health care provider for diagnostic purposes in managing individuals with diabetes.

    A health care provider uses short-term continuous glucose monitoring for diagnostic purposes in managing an individual with diabetes.3–14 days

    Long-Term CGM With Intensive Insulin Therapy

    For medical necessity clinical coverage criteria for initial and continuation requests, refer to the InterQual® CP: Durable Medical Equipment, Continuous Glucose Monitors, Insulin Pumps, and Automated Insulin Delivery Technology.

    The applicable InterQual® clinical coverage criteria for long-term nonimplantable continuous glucose monitoring in individuals receiving intensive insulin therapy are met.

    Initial Long-Term CGM With Nonintensive Therapy

    Initial long-term continuous glucose monitoring is medically necessary for individuals with diabetes on a nonintensive treatment plan when all of the following criteria are met.

    ALL of the following

    • The individual is on a nonintensive diabetes treatment plan, such as basal insulin and/or oral medications.
    • ONE of the following

      • The individual has a history of a level 3 hypoglycemic event.
      • The individual has recurrent level 2 hypoglycemic events, meaning more than one event.
    • The qualifying hypoglycemic events persist despite multiple attempts to adjust medication(s) and/or modify the diabetes treatment plan.

      Multiple means more than one attempt.

    Implantable Continuous Glucose Monitoring

    For medical necessity clinical coverage criteria for implantable glucose sensors, such as Eversense, refer to the Indiana Health Coverage Programs, Bulletin BT202520.

    The applicable Indiana Health Coverage Programs criteria for implantable continuous glucose monitoring are met.

    FDA-Labeled Use of External Pumps

    External continuous subcutaneous insulin infusion pumps, including Omnipod, are proven and medically necessary in certain circumstances when used according to FDA labeling.

    ALL of the following

    • The external pump is used for a medically necessary circumstance covered by the applicable clinical criteria.
    • The pump is used according to U.S. Food and Drug Administration (FDA)-labeled indications, contraindications, warnings, and precautions.

    External Pumps for Diabetes From Other Causes

    External continuous subcutaneous insulin infusion pumps are medically necessary for diabetes due to causes other than type 1, type 2, or gestational diabetes when the diabetes requires intensive insulin therapy.

    ALL of the following

    • The individual has diabetes due to a cause other than type 1, type 2, or gestational diabetes. Examples include cystic fibrosis-related diabetes, posttransplant diabetes, and diabetes following pancreatic surgery.
    • The individual is treated with insulin at least three times a day.≥ 3 times daily

    Nonprogrammable transdermal insulin delivery systems, including V-Go®, are unproven and not medically necessary for managing individuals with diabetes due to insufficient evidence of efficacy.

    Implantable insulin pumps are unproven and not medically necessary because of insufficient evidence of efficacy.

    Long-term continuous glucose monitoring is unproven and not medically necessary for individuals with diabetes on a nonintensive treatment plan, such as basal insulin and/or oral medications, for all indications other than an applicable qualifying indication, including a history of a level 3 hypoglycemic event or recurrent (more than one) level 2 hypoglycemic events that persist despite multiple (more than one) attempts to adjust medication(s) and/or modify the diabetes treatment plan.

    Implantable insulin pumps are currently available only in a clinical trial setting.

    Continuous glucose monitoring systems that are available over the counter without a prescription, such as Dexcom Stelo, Abbott Lingo, and Abbott Libre Rio, are out of scope for this policy. These products are obtained through a local pharmacy and are not supported by mail-order durable medical equipment providers.

    Nonprogrammable transdermal insulin delivery systems, such as V-Go®, are not medically necessary due to insufficient evidence of efficacy.

    Implantable insulin pumps are not medically necessary due to insufficient evidence of efficacy.

    For individuals receiving nonintensive therapy, long-term continuous glucose monitoring is not medically necessary unless the individual has a qualifying history of a level 3 hypoglycemic event or recurrent (more than one) level 2 hypoglycemic events that persist despite multiple (more than one) attempts to adjust medication(s) and/or modify the diabetes treatment plan.

    Applicable Codes and Coding Definitions

    Applicable CodesCPT
    *0446TCreation of subcutaneous pocket with insertion of implantable interstitial glucose sensor, including system activation and patient training.
    *0448TRemoval of implantable interstitial glucose sensor with creation of subcutaneous pocket at different anatomic site and insertion of new implantable sensor, including system activation.
    *95249Ambulatory continuous glucose monitoring of interstitial tissue fluid via a subcutaneous sensor for a minimum of 72 hours; patient-provided equipment, sensor placement, hook-up, calibration of monitor, patient training, and printout of recording.
    *95250Ambulatory continuous glucose monitoring of interstitial tissue fluid via a subcutaneous sensor for a minimum of 72 hours; physician or other qualified health care professional (office) provided equipment, sensor placement, hook-up, calibration of monitor, patient training, removal of sensor, and printout of recording.
    *95251Ambulatory continuous glucose monitoring of interstitial tissue fluid via a subcutaneous sensor for a minimum of 72 hours; analysis, interpretation and report.
    Applicable CodesHCPCS
    *A4226Supplies for maintenance of insulin infusion pump with dosage rate adjustment using therapeutic continuous glucose sensing, per week.
    *A4238Supply allowance for adjunctive, nonimplanted continuous glucose monitor (CGM), includes all supplies and accessories, 1 month supply = 1 unit of service.
    *A4239Supply allowance for nonadjunctive, nonimplanted continuous glucose monitor (CGM), includes all supplies and accessories, 1 month supply = 1 unit of service.
    A9274External ambulatory insulin delivery system, disposable, each, includes all supplies and accessories.
    A9276Sensor; invasive (e.g., subcutaneous), disposable, for use with nondurable medical equipment interstitial continuous glucose monitoring system (CGM), one unit = 1 day supply.
    Applicable CodesHCPCS
    A9277Transmitter; external, for use with nondurable medical equipment interstitial continuous glucose monitoring system (CGM).
    A9278Receiver (monitor); external, for use with nondurable medical equipment interstitial continuous glucose monitoring system (CGM).
    E0784External ambulatory infusion pump, insulin.
    *E0787External ambulatory infusion pump, insulin, dosage rate adjustment using therapeutic continuous glucose sensing.
    *E2102Adjunctive, nonimplanted continuous glucose monitor (CGM) or receiver.
    *E2103Nonadjunctive, nonimplanted continuous glucose monitor (CGM) or receiver.
    *S1030Continuous noninvasive glucose monitoring device, purchase (for physician interpretation of data, use CPT code).
    *S1031Continuous noninvasive glucose monitoring device, rental, including sensor, sensor replacement, and download to monitor (for physician interpretation of data, use CPT code).
    *S1034Artificial pancreas device system (e.g., low glucose suspend [LGS] feature) including continuous glucose monitor, blood glucose device, insulin pump and computer algorithm that communicates with all of the devices.
    *S1035Sensor; invasive (e.g., subcutaneous), disposable, for use with artificial pancreas device system.
    1–10 of 12
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    Applicable CodesICD-10
    E11.00Type 2 diabetes mellitus with hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma (NKHHC).
    E11.01Type 2 diabetes mellitus with hyperosmolarity with coma.
    E11.10Type 2 diabetes mellitus with ketoacidosis without coma.
    E11.11Type 2 diabetes mellitus with ketoacidosis with coma.
    E11.21Type 2 diabetes mellitus with diabetic nephropathy.
    E11.22Type 2 diabetes mellitus with diabetic chronic kidney disease.
    E11.29Type 2 diabetes mellitus with other diabetic kidney complication.
    E11.311Type 2 diabetes mellitus with unspecified diabetic retinopathy with macular edema.
    E11.319Type 2 diabetes mellitus with unspecified diabetic retinopathy without macular edema.
    E11.3211Type 2 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema, right eye.
    1–10 of 17
    1/2
    Applicable CodesICD-10
    E11.3311Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema, right eye.
    E11.3312Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema, left eye.
    E11.3399Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema, unspecified eye.
    E11.3411Type 2 diabetes mellitus with severe nonproliferative diabetic retinopathy with macular edema, right eye.
    E11.3412Type 2 diabetes mellitus with severe nonproliferative diabetic retinopathy with macular edema, left eye.
    E11.3413Type 2 diabetes mellitus with severe nonproliferative diabetic retinopathy with macular edema, bilateral.
    E11.3419Type 2 diabetes mellitus with severe nonproliferative diabetic retinopathy with macular edema, unspecified eye.
    E11.3491Type 2 diabetes mellitus with severe nonproliferative diabetic retinopathy without macular edema, right eye.
    E11.3492Type 2 diabetes mellitus with severe nonproliferative diabetic retinopathy without macular edema, left eye.
    Applicable ICD-10 Diagnosis Codes: Type 2 Diabetes and Diabetic RetinopathyICD-10
    E11.00Type 2 diabetes mellitus with hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma (NKHHC)
    E11.01Type 2 diabetes mellitus with hyperosmolarity with coma
    E11.10Type 2 diabetes mellitus with ketoacidosis without coma
    E11.11Type 2 diabetes mellitus with ketoacidosis with coma
    E11.21Type 2 diabetes mellitus with diabetic nephropathy
    E11.22Type 2 diabetes mellitus with diabetic chronic kidney disease
    E11.29Type 2 diabetes mellitus with other diabetic kidney complication
    E11.311Type 2 diabetes mellitus with unspecified diabetic retinopathy with macular edema
    E11.319Type 2 diabetes mellitus with unspecified diabetic retinopathy without macular edema
    E11.3211Type 2 diabetes mellitus with mild nonproliferative diabetic retinopathy with macular edema, right eye
    1–10 of 37
    1/4
    Applicable ICD-10 Diagnosis Codes: Additional Type 2 Diabetes ComplicationsICD-10
    E11.3549Type 2 diabetes mellitus with proliferative diabetic retinopathy with combined traction retinal detachment and rhegmatogenous retinal detachment, unspecified eye
    E11.3551Type 2 diabetes mellitus with stable proliferative diabetic retinopathy, right eye
    E11.3552Type 2 diabetes mellitus with stable proliferative diabetic retinopathy, left eye
    E11.3553Type 2 diabetes mellitus with stable proliferative diabetic retinopathy, bilateral
    E11.3559Type 2 diabetes mellitus with stable proliferative diabetic retinopathy, unspecified eye
    E11.3591Type 2 diabetes mellitus with proliferative diabetic retinopathy without macular edema, right eye
    E11.3592Type 2 diabetes mellitus with proliferative diabetic retinopathy without macular edema, left eye
    E11.3593Type 2 diabetes mellitus with proliferative diabetic retinopathy without macular edema, bilateral
    E11.3599Type 2 diabetes mellitus with proliferative diabetic retinopathy without macular edema, unspecified eye
    E11.36Type 2 diabetes mellitus with diabetic cataract
    1–10 of 36
    1/4
    Applicable ICD-10 Diagnosis Codes: Type 2 and Gestational DiabetesICD-10
    E11.9Type 2 diabetes mellitus without complications
    O24.111Pre-existing type 2 diabetes mellitus, in pregnancy, first trimester
    O24.112Pre-existing type 2 diabetes mellitus, in pregnancy, second trimester
    O24.113Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester
    O24.119Pre-existing type 2 diabetes mellitus, in pregnancy, unspecified trimester
    O24.12Pre-existing type 2 diabetes mellitus, in childbirth
    O24.13Pre-existing type 2 diabetes mellitus, in the puerperium
    O24.410Gestational diabetes mellitus in pregnancy, diet controlled
    O24.414Gestational diabetes mellitus in pregnancy, insulin controlled
    O24.415Gestational diabetes mellitus in pregnancy, controlled by oral hypoglycemic drugs
    1–10 of 19
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    External insulin pumpsFDA product code
    LZGExternal insulin pumps
    QFGExternal insulin pumps
    Automated insulin delivery systems or hybrid closed-loop insulin pumpsFDA product code
    OZPAutomated insulin delivery systems or hybrid closed-loop insulin pumps
    Continuous glucose monitorsFDA product code
    MDSContinuous glucose monitors
    QCDContinuous glucose monitors
    QHJContinuous glucose monitors
    Eversense 365 CGMFDA product code
    SBAEversense 365 continuous glucose monitor
    Intensive Insulin Therapy
    DefinitionInsulin treatment at least three times a day
    Applies toIntensive insulin therapy
    Policy contextUsed in coverage criteria for external insulin pumps for diabetes caused by conditions other than type 1, type 2, or gestational diabetes
    Short-Term CGM Duration
    Definition

    Provider Actions and Coverage Risks

    Prior Authorization

    Indiana CGM Prior Authorization

    For Indiana CGM requests, preferred products do not require prior authorization. Non-preferred products must meet the applicable coverage criteria before coverage can be approved.

    • Preferred Indiana CGM products: No prior authorization required.
    • Non-preferred Indiana CGM products: Coverage criteria apply whether the request is submitted through UnitedHealthcare’s prior authorization process or a contracted supplier.
    Prior Authorization

    InterQual Criteria Required

    Use the InterQual® CP: Durable Medical Equipment, Continuous Glucose Monitors, Insulin Pumps, and Automated Insulin Delivery Technology criteria for initial and continuation requests involving external pumps and nonimplantable CGMs.

    • External continuous subcutaneous insulin infusion pumps, including Omnipod, may be medically necessary when used according to FDA-labeled indications, contraindications, warnings, and precautions and the applicable InterQual criteria are met.
    • External pumps may also be medically necessary for diabetes other than type 1, type 2, or gestational diabetes when intensive insulin therapy is required, defined as insulin treatment at least three times daily. Examples include cystic-fibrosis-related diabetes, posttransplant diabetes, and diabetes following pancreatic surgery.

    Policy Background

    This policy addresses glucose monitoring and insulin-delivery technologies used to manage diabetes, including external insulin pumps, nonimplantable and implantable continuous glucose monitors, and short-term professional CGM. Coverage requirements differ according to treatment intensity and hypoglycemia history. Intensive insulin therapy includes insulin treatment at least three times daily, while selected individuals receiving nonintensive therapy may qualify for long-term CGM because of persistent clinically significant hypoglycemia.

    Definitions

    Adjunctive Continuous Glucose Monitor
    Verification requirementGlucose levels or trends displayed on the CGM must be verified with a blood glucose monitor before treatment decisions
    Device typeAdjunctive continuous glucose monitor
    Clinical roleProvides CGM information that requires stand-alone blood glucose confirmation
    Hypoglycemia, Level 2
    DefinitionGlucose below 54 mg/dL
    Equivalent threshold3.0 mmol/L
    Clinical significanceAssociated with increased risk for cognitive dysfunction and mortality
    Policy Summary
    PayerUnitedHealthcare
    PolicyContinuous Glucose Monitoring and Insulin Delivery for Managing Diabetes (for Indiana Only)
    Policy CodePolicy CS024IN.15
    Change TypeModified
    Effective DateOctober 1, 2026
    Next Review DateN/A
    Key ActionFor medical-necessity criteria for external insulin pumps, intensive insulin therapy, and nonimplantable CGM requests, refer to InterQual clinical criteria.
    SourceLink
    On This Page
    Coverage CriteriaApplicable Codes and Coding DefinitionsProvider Actions and Coverage RisksPolicy BackgroundDefinitions
    CGM use for 3–14 days
    UseShort-term diagnostic or professional monitoring
    Authorization categoryShort-term continuous glucose monitoring
    Long-Term CGM Duration
    DefinitionCGM use greater than 14 days
    UseLong-term continuous glucose monitoring
    Initial authorizationUp to 6 months
    ReauthorizationUp to 12 months
    Level 2 Hypoglycemia
    DefinitionGlucose below 54 mg/dL
    Equivalent threshold3.0 mmol/L
    Clinical significanceAssociated with increased risk for cognitive dysfunction and mortality
    Recurrent Level 2 Hypoglycemia
    DefinitionMore than one level 2 hypoglycemic event
    Level 2 thresholdGlucose below 54 mg/dL (3.0 mmol/L)
    Coverage contextEvents must persist despite multiple treatment-plan or medication-adjustment attempts for qualifying nonintensive-therapy CGM coverage
    Treatment-Plan Adjustment Attempts
    DefinitionMore than one attempt
    Adjustment typesAdjust medication(s) and/or modify the diabetes treatment plan
    Coverage contextAttempts must be unsuccessful in stopping qualifying persistent hypoglycemic events
    Baseline HbA1c in V-Go Study
    Baseline HbA1c thresholdAt least 7%
    Study population188 participants with type 2 diabetes and suboptimal glycemic control
    Study typeProspective, observational, open-label, multicenter V-Go study
    V-Go Study Hypoglycemic Event Threshold
    Hypoglycemic event thresholdAt or below 70 mg/dL
    Participants reporting events22 participants (12%)
    Reported event rate1.51 events per participant per year
    Intensive Insulin Therapy
    DefinitionInsulin treatment at least three times a day
    Applies toIntensive insulin therapy
    Policy contextExternal continuous subcutaneous insulin infusion pumps for diabetes caused by conditions other than type 1, type 2, or gestational diabetes
  1. Apply the InterQual criteria to nonimplantable CGM requests for intensive insulin therapy, including both initial and continuation requests.
  2. Documentation Required

    Document Medical Necessity

    The medical record must fully support the medical necessity of the requested service. Documentation may be requested to evaluate clinical criteria, but submitting documentation does not guarantee coverage.

    • Include relevant medical history, physical examination findings, and results of pertinent diagnostic tests or procedures.
    • Ensure medical-necessity documentation is legible, maintained in the patient’s medical record, and available upon request.
    Denial Risk

    Unproven Insulin-Delivery Devices

    Nonprogrammable transdermal insulin delivery systems and implantable insulin pumps are unproven and not medically necessary under this policy.

    • Nonprogrammable transdermal insulin delivery systems, such as V-Go®, are unproven because of insufficient evidence of efficacy.
    • Implantable insulin pumps are unproven and not medically necessary.
    Denial Risk

    Nonintensive Therapy: Hypoglycemia Requirement

    Long-term CGM is not medically necessary for individuals on a nonintensive diabetes treatment plan unless the qualifying hypoglycemia criteria are met.

    • Initial long-term CGM may be medically necessary for patients using basal insulin and/or oral medications who have a history of a level 3 hypoglycemic event or recurrent (more than one) level 2 hypoglycemic events.
    • The qualifying events must persist despite multiple (more than one) attempts to adjust medication(s) and/or modify the diabetes treatment plan.
    • All other indications for long-term CGM in nonintensive therapy are unproven and not medically necessary.
    Prior Authorization

    Non-Preferred CGM Criteria

    Non-preferred Indiana CGM products must satisfy the policy’s coverage criteria regardless of how the request is submitted.

    • Apply the criteria whether the request is submitted through UnitedHealthcare prior authorization or by a contracted supplier.
    • Preferred Indiana CGM products do not require prior authorization; this does not change the criteria applicable to non-preferred products.
    Denial Risk

    Implantable Pumps Limited to Clinical Trials

    Implantable insulin pumps are currently available only in a clinical trial setting and are not generally available for coverage under this policy.

    • Do not request routine coverage for an implantable insulin pump outside a clinical trial setting.
    Denial Risk

    Insufficient Evidence for Nonprogrammable Devices

    There is insufficient clinical evidence demonstrating the safety and efficacy of nonprogrammable wearable, disposable insulin delivery devices for diabetes management.

    • Available evidence is limited by factors including lack of a control group, high attrition, retrospective study designs, small sample sizes, and/or short-term follow-up.
    • Larger, well-designed studies with long-term follow-up and comparative-effectiveness data are needed.
    Denial Risk

    FDA Approval Is Not Coverage

    FDA approval or clearance alone does not establish coverage. The requested service or device must also meet the applicable UnitedHealthcare policy and clinical coverage criteria.

    • Do not treat FDA approval, clearance, or labeling as sufficient evidence of benefit coverage.
    Billing Rule

    Over-the-Counter CGMs Out of Scope

    Over-the-counter CGMs are outside the scope of this policy and should not be submitted as policy-covered durable medical equipment requests.

    • Examples include Dexcom Stelo, Abbott Lingo, and Abbott Libre Rio.
    • These products are obtained through a local pharmacy without a prescription and are not supported by mail-order durable medical equipment providers.
    Hypoglycemia, Level 3
    DefinitionA severe hypoglycemic event involving an altered mental and/or physical state
    Assistance requiredThird-party assistance is required for treatment
    Clinical significanceLife-threatening and requires emergent treatment
    Intermittently Scanned (Flash) Continuous Glucose Monitor
    ComponentsCombined glucose sensor/transmitter and separate reader
    MonitoringMeasures glucose levels continuously
    User interactionRequires scanning to visualize and store glucose values; devices may have alarms
    Nonadjunctive Continuous Glucose Monitor
    Treatment decisionsCan be used without a stand-alone blood glucose monitor to confirm testing results
    Device typeNonadjunctive continuous glucose monitor
    Confirmation requirementStand-alone blood glucose confirmation is not required
    Professional Continuous Glucose Monitor
    PlacementPlaced in a healthcare professional's office or used with remote instruction
    Wear periodDiscrete period, generally 7–14 days
    Purpose and ownershipData assess glycemic patterns and trends; the clinic-based device is not owned by the user
    Real-Time Continuous Glucose Monitor
    SensorSmall wire catheter inserted under the skin
    TransmissionTransmitter attaches to the sensor and sends information
    Display and alertsHandheld receiver and/or smartphone displays glucose readings continuously in real time and provides audible out-of-range alerts
    Insulin Pump
    DeliveryMay deliver continuous basal insulin and mealtime bolus doses
    Standard pumpUses flexible plastic tubing ending with a needle inserted just under the skin
    Patch deviceMay use a skin-mounted insulin reservoir and wireless controller
    Continuous Glucose Monitor (CGM)
    FunctionContinuously monitors and records interstitial glucose levels
    ComponentsGenerally includes a sensor, transmitter, and receiver
    ConfigurationsMay be professional or personal, real-time or intermittently scanned, disposable or implantable, and may or may not integrate with an external insulin pump
    Real-Time CGM or Intermittently Scanned (Flash) CGM
    DefinitionCGM intended for long-term personal use
    Data displayDisplays glucose data to the individual
    PurposeAllows the individual to take action based on the displayed information
    Implantable CGM Sensor
    Sensor placementInserted subcutaneously
    Transmission componentsCommunicates through a smart transmitter and mobile application
    Data transmissionWirelessly transmits glucose levels to a mobile device