Summary & Overview
HCPCS S1035: Invasive Subcutaneous Sensor for Artificial Pancreas Device System
HCPCS Level II code S1035 identifies a disposable invasive subcutaneous sensor used with an artificial pancreas device system. As automated insulin delivery systems expand, this sensor component is a critical supply item enabling continuous glucose sensing and closed-loop insulin adjustments. Nationally, coverage and payment policies for device components such as S1035 affect access to artificial pancreas therapies and the out-of-pocket costs patients face.
Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for the sensor, common payer coverage patterns, and the types of benchmarks and policy updates that typically influence coding and payment for disposable glucose sensors. The publication summarizes where S1035 fits in benefit design, typical sites of service, and the service classification as a durable medical device accessory or diabetes monitoring supply.
This summary prepares readers to review benchmarks, payer-specific coverage nuances, and policy developments that can impact procurement and clinical workflows for artificial pancreas device systems and their consumable sensors.
Billing Code Overview
HCPCS Level II code S1035 describes a sensor; invasive (e.g., subcutaneous), disposable, for use with artificial pancreas device system. This item is a disposable subcutaneous sensor component intended to measure interstitial glucose and interface with an artificial pancreas device system to support automated insulin delivery.
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Service type: Durable medical device accessory / diabetes monitoring supply
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Typical site of service: Outpatient ambulatory settings, home use, or other non-acute care settings where patients use an artificial pancreas device system
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Clinical & Coding Specifications
Clinical Context
A 42-year-old adult with type 1 diabetes mellitus is managed with an integrated artificial pancreas device system that automates insulin delivery based on continuous glucose sensing. The patient presents to an outpatient diabetes clinic for routine replacement of the disposable subcutaneous sensor component of the system. The clinic nurse prepares the device, performs a brief skin inspection at the planned insertion site, performs aseptic technique, inserts the disposable invasive sensor subcutaneously, programs the receiver/controller to recognize the new sensor, and provides brief device-specific education on site care and sensor troubleshooting. The sensor is single-use and billed separately from durable medical equipment for the controller and insulin pump. Typical workflow includes device supply verification, site assessment, sensor insertion (disposable), device pairing and calibration as needed, documentation of lot numbers and informed consent, and scheduling of follow-up remote or in-person device checks.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
AS | Clinic or ambulatory surgical center (ASC) facility | Use when the service is furnished in an ambulatory surgical center setting |
CO | Services related to a clinical trial | Use when the sensor is provided as part of a clinical research study subject to trial reporting rules |
CQ | Service furnished under an outpatient prospective payment system (OPPS)-exempt status | Use when billing indicates OPPS-exempt supply status where applicable |
FY | Item furnished as part of a clinical trial device arm | Use for devices supplied within a clinical trial with device-specific reporting requirements |
NU | New equipment | Use when the sensor is furnished as new, non-rental disposable equipment |
QK | Surgical team; qualified nonphysician anesthetist (when used for anesthesia) | Use only if part of a bundled surgical team or anesthesia-related billing scenario applies |
QX | Service performed by a certified nurse-midwife or clinical nurse specialist | Use when the inserting clinician is an eligible nonphysician practitioner and payer requires QX reporting |
QY | Service performed by a physician assistant | Use when a physician assistant performs the insertion and payer asks to identify PA-performed services |
RR | Rental equipment | Use if payer requires indicating the item is a rental rather than purchased (rare for disposables) |
TG | Service performed under an approved training program | Use when insertion is performed by a trainee under a qualified training arrangement and payer requires TG |
UE | Used durable medical equipment | Use when a used device component is supplied (rare for disposable sensors) |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207Q00000X | Endocrinology | Specialty that manages insulin delivery systems and artificial pancreas therapy |
163W00000X | Physician Assistant | PAs frequently perform device insertions and outpatient device management |
363A00000X | Certified Diabetes Care and Education Specialist | Provides device education, calibration instruction, and follow-up support |
173E00000X | Nurse Practitioner | NPs perform sensor insertion and ongoing device management in outpatient settings |
208D00000X | Family Medicine | Primary care clinicians who manage diabetes and supervise device use |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
E10.9 | Type 1 diabetes mellitus without complications | Primary indication for use of an artificial pancreas device system and subcutaneous glucose sensor |
E11.9 | Type 2 diabetes mellitus without complications | Some patients with insulin-requiring type 2 diabetes use hybrid closed-loop systems requiring sensors |
E10.65 | Type 1 diabetes mellitus with hyperglycemia | Sensor data help detect and manage hyperglycemia events and adjust automated insulin delivery |
E10.64 | Type 1 diabetes mellitus with hypoglycemia with coma | Sensors assist in hypoglycemia detection and automated mitigation strategies in closed-loop systems |
E11.65 | Type 2 diabetes mellitus with hyperglycemia | Sensor-guided systems used to monitor and respond to hyperglycemia in insulin-treated type 2 diabetes |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
95250 | Continuous glucose monitoring; placement of sensor with initial calibration and report transmission when performed, 1 day of recording | Often performed at initial sensor placement or for first-day set-up when insertion includes professional services and calibration data capture |
95251 | Continuous glucose monitoring; analysis, interpretation, and report; each 24-hour period | Used when the clinician reviews and interprets CGM data from the sensor over a 24-hour period as a billed professional service |
99072 | Additional supplies, materials, and clinical staff time over and above those usually required (e.g., for infection control) | Used when extraordinary supplies or additional staff time are required for sensor insertion in special circumstances |
99406 | Smoking and tobacco use cessation counseling visit, intermediate | Related counseling code sometimes billed separately when addressing behavioral interventions concurrent with device education |
99000 | Handling and/or conveyance of specimen for transfer from patient to laboratory | Included for workflows that require lab testing coordinated with device initiation (rarely used directly for sensor) |