E2102 Adjunctive Non-Implanted CGM Reimbursement | OpenPayer

Summary & Overview

HCPCS E2102: Adjunctive Non-Implanted Continuous Glucose Monitor or Receiver

HCPCS Level II code E2102 designates an adjunctive, non-implanted continuous glucose monitor or receiver — an external device that supplements glucose management by providing ongoing glucose readings. Nationally, this code matters as CGM technology expands use for diabetes management, influences durable medical equipment coverage policies, and affects billing workflows for outpatient and home-based care.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what E2102 represents, typical sites of service, and the clinical context for adjunctive CGM devices. The publication outlines payer coverage considerations, common modifiers used with HCPCS Level II codes, and where E2102 fits within durable medical equipment billing practices.

This report also provides benchmarks and policy-relevant updates that affect reimbursement and utilization for non-implanted CGM receivers, plus practical notes on documentation and coding alignment. Data not provided in the input are noted explicitly where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareE2102HCPCS Level IIcontinuous glucose monitordurable medical equipmentdiabetes technologyoutpatienthome healthmedical device coding

Billing Code Overview

HCPCS Level II code E2102 describes an adjunctive, non-implanted continuous glucose monitor or receiver. This device is used as a supplemental glucose monitoring tool that is worn externally (non-implanted) and functions as a continuous glucose monitor (CGM) or a receiver that displays CGM data.

Service type: Durable medical equipment / continuous glucose monitoring device

Typical site of service: Outpatient, home, or other ambulatory settings where patients use external glucose monitoring devices

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A patient with insulin-treated diabetes presents for adjunctive, non-implanted continuous glucose monitoring (CGM) device setup and education. Typical patients include adults or pediatric patients on multiple daily injections or insulin pump therapy who require intermittent adjunctive CGM data to inform insulin dosing decisions, hypoglycemia avoidance, or glucose trend review. Clinical workflow: intake by nursing to confirm diabetes type, insulin regimen, allergies, and prior CGM use; device provisioning (receiver or reader linked to a patient’s disposable sensor), device configuration and pairing, baseline capillary blood glucose check for sensor calibration if required, structured patient education on sensor wear, alarms, data interpretation, and troubleshooting, documentation of device serial number and lot, and scheduling follow-up for data review. Clinical staff may download or verify data transmission to clinician portal and create a brief plan of care noting sensor performance, any acute issues (severe hypoglycemia, diabetic ketoacidosis), and recommendations for glucose targets. Billing is for the adjunctive non-implanted CGM or receiver supply and associated setup at the typical ambulatory outpatient clinic or endocrinology practice site of service.

Coding Specifications

Modifier	Description	When to Use
`00`	Standard service	Use when no modifier is required; represents unmodified procedure.

HCPCS Level II E1231: Pediatric Tilt-in-Space Rigid Wheelchair with Seating System

HCPCS-E0985-WHEELCHAIR-SEAT-LIFT-MECHANISM

HCPCS Level II E0985: Wheelchair Accessory, Seat Lift Mechanism

HCPCS-E0466-HOME-VENTILATOR-NONINVASIVE-INTERFACE

HCPCS E0466: Home Ventilator, Non-Invasive Interface

HCPCS-E0485-ORAL-APPLIANCE-UPPER-AIRWAY-COLLAPSIBILITY

HCPCS E0485: Prefabricated Oral Appliance to Reduce Upper Airway Collapsibility

HCPCS-E0274-OVER-BED-TABLE

HCPCS E0274: Over-bed Table

HCPCS-E0460-NEGATIVE-PRESSURE-VENTILATOR-PORTABLE-STATIONARY

HCPCS Level II E0460: Negative Pressure Ventilator, Portable or Stationary

HCPCS-E0957-WHEELCHAIR-MEDIAL-THIGH-SUPPORT

HCPCS E0957: Wheelchair Medial Thigh Support

HCPCS-E0296-TOTAL-ELECTRIC-HOSPITAL-BED-WITH-MATTRESS

HCPCS E0296: Total Electric Hospital Bed with Mattress

HCPCS-E0461-VOLUME-CONTROL-VENTILATOR-NONINVASIVE

HCPCS E0461: Volume Control Ventilator, Non-Invasive

HCPCS-E2371-POWER-WHEELCHAIR-SEALED-LEAD-ACID-BATTERY

HCPCS E2371: Power Wheelchair Group 27 Sealed Lead Acid Battery

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Taxonomy Code	Specialty	Notes
`207RE0000X`	Endocrinology, Diabetes & Metabolism	Typical clinicians ordering and managing CGM devices.
`163W00000X`	Family Medicine	Primary care clinicians who initiate CGM in insulin-treated patients.
`208D00000X`	Internal Medicine	Hospital-based or outpatient internists managing diabetes and CGM orders.
`363L00000X`	Nurse Practitioner	Advanced practice providers who often perform education, setup, and follow-up.
`363A00000X`	Physician Assistant	Clinician often performing device provisioning and documentation.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E10.9`	Type 1 diabetes mellitus without complications	Typical indication for adjunctive CGM to assist with insulin dosing and hypoglycemia prevention.
`E11.9`	Type 2 diabetes mellitus without complications	Frequently used for insulin-treated type 2 patients who benefit from adjunctive CGM data.
`E10.65`	Type 1 diabetes mellitus with hyperglycemia	Adjunctive CGM helps identify hyperglycemia patterns and treatment response.
`E11.65`	Type 2 diabetes mellitus with hyperglycemia	Clinical relevance for monitoring uncontrolled glucose trends while on insulin.
`E10.641`	Type 1 diabetes mellitus with hypoglycemia with coma	CGM can assist in hypoglycemia detection and prevention strategies.
`E11.641`	Type 2 diabetes mellitus with hypoglycemia with coma	Relevant for patients with severe hypoglycemia risk who need continuous monitoring.
`R73.9`	Hyperglycemia, unspecified	Used when hyperglycemia is present but specific diabetes coding is deferred; adjunctive CGM assists evaluation.
`Z46.81`	Encounter for fitting and adjustment of glucose monitoring device	Specific encounter code for device fitting and education associated with CGM supply.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`95250`	Ambulatory continuous glucose monitoring of interstitial tissue/fluid via a subcutaneous sensor for a minimum of 72 hours; sensor placement, hook-up, patient training, and printout of recording and interpretation	Commonly performed when a professional CGM is placed and requires clinician setup, training, and data download; may be used when clinic places and manages CGM sensors.
`95251`	Analysis, interpretation, and report of CGM data (may be performed separately)	Used for subsequent professional review and interpretation of CGM data collected from the adjunctive device.
`99406`	Smoking and tobacco use cessation counseling, intermediate, greater than 3 minutes up to 10 minutes	Example of ancillary counseling codes sometimes billed during diabetes education visits; not specific to CGM.
`99070`	Supplies and materials (e.g., gloves, supplies), used during patient care, not included in another procedure or service	Occasionally billed for incidental non-device supplies associated with device setup where payers allow.
`99091`	Collection and interpretation of physiologic data digitally stored and/or transmitted by the patient and/or caregiver to the physician or other qualified health care professional, requiring a minimum of 30 minutes of time	Applicable when clinicians review and interpret remotely transmitted CGM data and document time spent.

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