Summary & Overview

HCPCS G0343: Laparotomy for Islet Cell Transplant with Portal Vein Infusion

HCPCS Level II code G0343 represents a laparotomy performed for islet cell transplantation that includes portal vein catheterization and infusion. This procedure is a key component of clinical islet transplantation programs for select patients with severe endocrine pancreatic insufficiency and is significant for hospital billing and transplant program resource planning. Nationally, the code captures a complex surgical-transplant service with implications for facility use, operating room time, and post-procedure monitoring.

Key payers covered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical service tied to the code, typical sites of service, and which payers commonly adjudicate claims for this procedure. The publication outlines benchmarks and patterns relevant to reimbursement and coverage policy, summarizes payer-specific coverage considerations where available, and provides clinical context about the procedure’s role in islet cell transplantation programs.

This summary is intended for revenue cycle leaders, transplant program administrators, and health policy analysts seeking a national perspective on how G0343 is used in billing and coverage conversations and what factors influence authorization, facility billing, and program evaluation.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareG0343HCPCS Level IIislet cell transplantlaparotomyportal vein infusionsurgical transplanthospital billingtransplant program

Billing Code Overview

HCPCS Level II code G0343 describes a laparotomy for islet cell transplant, including portal vein catheterization and infusion. The service involves a surgical abdominal approach to access the liver vasculature, catheterize the portal vein, and infuse donor islet cells for transplantation.

Service type: Surgical transplant procedure

Typical site of service: Inpatient or outpatient surgical operating room at a hospital or specialized transplant center

Clinical & Coding Specifications

Clinical Context

A 45-year-old patient with type 1 diabetes mellitus and labile glycemic control is evaluated for pancreatic islet cell transplantation to reduce hypoglycemia unawareness and improve glycemic stability. The patient is admitted to a tertiary care center with an experienced transplant surgery team and interventional radiology support. The clinical workflow includes preoperative evaluation (endocrinology, transplant surgery, anesthesia evaluation, infectious disease screening), procurement and isolation of donor islets in a certified islet isolation laboratory, and scheduling of a laparotomy for islet cell transplant.

On the day of procedure the patient undergoes general endotracheal anesthesia. The surgical team performs a laparotomy to access the portal structures, places a portal vein catheter, and administers the islet cell infusion into the portal venous system. Intraoperative monitoring includes hemodynamics, portal pressures, and blood glucose monitoring. Post-procedure the patient is observed in a monitored bed or intensive care setting for portal vein thrombosis surveillance, bleeding, and immediate graft function; anticoagulation and immunosuppression are managed per transplant protocol. Typical site of service is an inpatient operating room in a tertiary care hospital. Service type is an open major abdominal surgical procedure for organ/tissue transplantation including portal vein catheterization and infusion.

Coding Specifications

Modifier	Description	When to Use
`00`	Procedure fully rendered	Use when the service was performed as billed without alterations.
`11`	Office or institutional primary procedure	Use to indicate the primary procedure when multiple procedures are billed by the same provider.
`22`	Increased procedural services	Use when work required is substantially greater than typical (document justification).
`52`	Reduced services	Use when the procedure was partially reduced or not completed as originally planned.
`53`	Discontinued procedure	Use when the procedure is terminated due to patient-related or intraoperative circumstances.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions.
`66`	Surgical team	Use when a surgical team approach is used for complex transplant procedures.
`78`	Unplanned return to OR following initial procedure	Use when the patient returns to the operating room for related treatment during the global period.
`80`	Assistant surgeon	Use when an assistant surgeon participates and is eligible for assistant payment.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services	Use when an advanced practice clinician bills their portion of services as allowed.

Taxonomy Code	Specialty	Notes
`208100000X`	General Surgery	Primary specialty performing open abdominal access and portal catheterization for islet infusion.
`2080P0206X`	Transplant Surgery	Surgeons specialized in abdominal organ and islet cell transplantation procedures.
`207L00000X`	Interventional Radiology	May assist with portal vein catheter placement or image guidance when percutaneous approaches are used adjunctively.
`363A00000X`	Clinical Laboratory Director	Oversees islet isolation and preparation in certified cell-processing facilities.
`2084P0205X`	Surgical Critical Care	Manages perioperative critical care for transplant recipients after major abdominal surgery.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E10.9`	Type 1 diabetes mellitus without complications	Primary diagnosis indicating insulin-dependent diabetes, common indication for islet transplantation when labile control and hypoglycemia unawareness are present.
`E10.65`	Type 1 diabetes mellitus with hyperglycemia	Reflects inadequate glycemic control that may prompt evaluation for advanced therapies including islet transplant.
`E10.641`	Type 1 diabetes mellitus with hypoglycemia with coma	Severe hypoglycemia events that are an indication for considering islet transplantation to reduce life-threatening hypoglycemia.
`T86.828`	Other complications of transplanted organ and tissue	Used for postoperative transplant complications such as graft dysfunction or portal thrombosis related to islet infusion.
`I82.409`	Acute embolism and thrombosis of unspecified deep veins of lower extremity	Represents thrombotic complications surveillance; portal vein thrombosis uses proximal codes but thrombotic risk is clinically relevant.
`Z48.21`	Encounter for aftercare following organ transplant	Used during post-transplant follow-up care visits and management after islet cell transplantation.
`Z94.4`	Heart transplant status (placeholder for transplant status codes)	Status codes for transplanted organ influence long-term management; for islet cell transplant a more specific transplant status code is applied when available.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`48150`	Liver biopsy, wedge	May be performed intraoperatively to assess hepatic tissue or obtain samples for pathology prior to or after portal infusion.
`36445`	Placement of catheter, non-tunneled central venous (e.g., for infusion)	May be used pre- or postoperatively for central venous access for medications, fluids, or immunosuppression.
`49320`	Diagnostic laparoscopy, surgical; with biopsy(s) (single or multiple)	Alternative minimally invasive approach in select cases or used for diagnostic evaluation prior to open laparotomy.
`37184`	Introduction of catheter, arterial, venous, or venous sheath; radiological supervision and interpretation	Used when interventional radiology places or images portal venous catheters as part of catheterization and infusion.
`01992`	Anesthesia for open abdominal procedures (complex liver/transplant)	Anesthesia services reported for major open abdominal transplant procedures including islet transplantation.