Summary & Overview

HCPCS S1034: Artificial Pancreas Device System

HCPCS Level II code S1034 designates an artificial pancreas device system that integrates continuous glucose monitoring, a blood glucose measurement device, an insulin pump and a coordinating computer algorithm (for example, systems with low glucose suspend functionality). This designation is significant because automated insulin delivery systems represent a shift in diabetes care toward connected, closed-loop technology that can reduce hypoglycemia and improve glycemic control at scale. Nationally, adoption intersects durable medical equipment coverage, durable medical device benefit rules, and clinical protocols for type 1 and advanced insulin-requiring diabetes.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. Readers will find an overview of what S1034 represents clinically and operationally, a summary of payer coverage considerations and common billing modifiers, and contextual information relevant to procurement and site-of-service implementation. The publication also summarizes benchmarks and policy updates where available, and outlines clinical contexts in which an artificial pancreas device system may be used. Data not available in the input will be noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareS1034HCPCS Level IIartificial pancreascontinuous glucose monitoringinsulin pumpclosed-loop insulin deliverydurable medical equipmentdiabetes technology

Billing Code Overview

HCPCS Level II code S1034 describes an artificial pancreas device system that integrates a continuous glucose monitor, blood glucose device, insulin pump and a computer algorithm that communicates with all devices. The code captures systems with features such as low glucose suspend (LGS) and automated insulin delivery designed to maintain glycemic control by linking sensing, decision-making, and insulin delivery functions.

Service Type: Durable medical equipment / medical device supply and remote automated insulin delivery system management

Typical Site of Service: Home use and outpatient device management settings, including diabetes clinics and home health environments where patients use the integrated system for day-to-day glucose management.

Clinical & Coding Specifications

Clinical Context

A 17-year-old patient with type 1 diabetes mellitus is referred to an endocrinology clinic for evaluation and initiation of an integrated automated insulin delivery system. The device being issued is an artificial pancreas device system that integrates a continuous glucose monitor, an insulin pump with low glucose suspend (LGS) functionality, and a control algorithm that communicates among devices to automate insulin delivery. The typical clinical workflow includes: initial multidisciplinary assessment by an endocrinologist and diabetes educator; device training session for the patient and caregiver covering sensor insertion, pump operation, alarm management, and troubleshooting; baseline device setup and parameter programming (insulin sensitivity, carbohydrate ratios, target glucose range); in-clinic or remote supervised closed-loop activation and observation period to confirm safe automated insulin delivery and LGS response; provision of device supplies and documentation for durable medical equipment billing; follow-up telehealth or clinic visits at 1–2 weeks and monthly thereafter for data review, algorithm adjustments, and supply ordering. Typical site of service is an outpatient endocrinology clinic or diabetes care center; initial training and supervised activation may occur in a clinic education room or ambulatory procedure area. Typical patient scenario includes established need for automated insulin delivery due to suboptimal glycemic control or problematic hypoglycemia despite standard pump therapy, inability to achieve safe glucose targets, or high risk of nocturnal hypoglycemia that would benefit from LGS and closed-loop features.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required to evaluate, train, or customize the system is substantially greater than typical (extensive education, programming).
`52`	Reduced services	Use if limited device setup or abbreviated training is provided compared with standard.
`53`	Discontinued procedure	Use if device activation or training was started but stopped due to patient intolerance or safety concerns.
`62`	Co-surgery	Rare; use if two surgeons or proceduralists of different specialties are required for device implant-related procedures (not typical for non-implantable systems).
`78`	Return to operating/procedure room for related procedure during postoperative period	Use if patient returns for repeat activation or correction in a procedural setting shortly after initial activation.
`80`	Assistant surgeon	Use when an assistant surgeon is required during a procedure associated with device placement or revision.
`82`	Assistant surgeon (when qualified resident not available)	Use when assistant surgeon services are furnished and a qualified resident is not available.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant-at-surgery	Use when those clinicians act as surgical assistants during related procedural interventions.
`QK`	Medical direction of two, three, or four concurrent anesthesia procedures	Use when anesthesia services are medically directed during a procedure linked to device placement (if applicable).
`QX`	Qualified nonphysician anesthetist with medical direction by a physician	Use when a CRNA provides anesthesia under physician direction for a related procedure.

Taxonomy Code	Specialty	Notes
`207RE0102X`	Endocrinology, Diabetes & Metabolism	Primary clinicians for prescribing and tuning automated insulin delivery systems.
`3336S0003X`	Pediatric Endocrinology	Pediatric specialists for children and adolescents requiring device initiation and family education.
`251S00000X`	Clinical Nurse Specialist	Nurses specialized in diabetes education who provide device training and ongoing support.
`177P00000X`	Physician Assistant	Providers who perform device setup, education, and follow-up visits under supervision.
`363L00000X`	Registered Nurse	Diabetes educators and staff performing hands-on training and sensor/pump troubleshooting.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E10.9`	Type 1 diabetes mellitus without complications	Primary indication for an automated insulin delivery system in patients requiring intensive insulin management.
`E10.65`	Type 1 diabetes mellitus with hyperglycemia	Indicates need for improved glycemic control that an artificial pancreas system may address.
`E10.641`	Type 1 diabetes mellitus with hypoglycemia with coma	Highlights severe hypoglycemia risk where low glucose suspend and closed-loop features can improve safety.
`E10.649`	Type 1 diabetes mellitus with hypoglycemia without coma	Relevant for patients with recurrent hypoglycemia who benefit from LGS capabilities.
`E11.9`	Type 2 diabetes mellitus without complications	May be used in select insulin-requiring type 2 diabetes patients considered for advanced automated insulin delivery.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`95250`	Ambulatory continuous glucose monitor (CGM) placement and patient training on use and data interpretation	Used when placing and initiating a professional CGM as part of system setup or when transitioning from CGM to integrated closed-loop monitoring.
`95251`	Analysis, interpretation, and report of CGM data performed by a physician or other qualified health care professional	Used for review of CGM downloads to guide algorithm parameter adjustments and clinical decisions.
`94660`	Continuous inhalation treatment for acute airway obstruction (not directly related)	Data not applicable to this procedure; avoid billing unless clinically relevant.
`99457`	Remote physiologic monitoring treatment management services, clinical staff/physician/other qualified healthcare professional time in a calendar month, requiring interactive communication with the patient/caregiver	Used for remote monitoring and management of data generated by the artificial pancreas system, including algorithm adjustments and patient coaching.
`99458`	Each additional 20 minutes of remote physiologic monitoring treatment management services	Used when additional time is required beyond the initial remote management service.
`99070`	Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visit	Used for clinic-supplied disposable items or educational materials provided during device training.