CPT 33404 Apicoaortic Conduit Reimbursement | OpenPayer

Summary & Overview

CPT 33404: Apicoaortic Conduit (Aortic Valve Bypass)

CPT code 33404 denotes the apicoaortic conduit (AAC) procedure, also called an aortic valve bypass (AVB), in which a conduit and valve are created from the left ventricular apex to the aorta to bypass a diseased or obstructed native aortic valve. This complex cardiothoracic surgical intervention is used for patients with significant left ventricular outflow obstruction when conventional valve replacement or repair is not feasible. Nationally, the code represents a high-acuity cardiac surgical service with implications for inpatient surgical capacity, specialized cardiac surgical teams, and postoperative intensive care resources.

Key payers examined include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a concise overview of clinical context, coding and billing considerations, and payer coverage patterns. Readers will find benchmarks for utilization and reimbursement where available, summaries of relevant policy trends affecting coverage of advanced cardiac bypass procedures, and clinical context describing indications and typical care settings. The report is intended for coding professionals, hospital revenue cycle staff, clinical program leaders, and payers who need a clear, actionable description of CPT code 33404 and its role within cardiac surgical services.

Data not available in the input for specific associated taxonomies, ICD-10 diagnoses, related codes, and granular payer policy details.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare33404CPTapicoaortic conduitaortic valve bypasscardiac surgeryinpatient surgerycardiothoracicprocedure coding

Billing Code Overview

CPT code 33404 describes the surgical creation of an apicoaortic conduit (AAC), also known as an aortic valve bypass (AVB). The procedure establishes a conduit and valve from the left ventricular apex to the aorta to bypass an obstructed native aortic valve and reduce symptoms caused by left ventricular outflow obstruction.

Service Type: Cardiothoracic surgical procedure (open surgical bypass of the aortic valve)

Typical Site of Service: Inpatient hospital operating room or cardiac surgery suite, with postoperative care in an inpatient setting.

Clinical & Coding Specifications

Clinical Context

A typical patient is an older adult with symptomatic left ventricular outflow tract obstruction from severe aortic valve disease who remains a candidate for surgical intervention but may not be suitable for conventional aortic valve replacement due to hostile aortic root, prior chest radiation, porcelain aorta, extensive calcification, or hostile mediastinum. The patient often presents with progressive exertional dyspnea, angina, syncope, or heart failure symptoms despite medical therapy. Preoperative workup includes transthoracic and transesophageal echocardiography documenting severe aortic stenosis or outflow obstruction, cardiac catheterization to assess coronary anatomy and hemodynamics, cross-sectional imaging (CT) to evaluate the ascending aorta and chest anatomy, and routine preoperative labs.

In the clinical workflow, the cardiothoracic surgical team evaluates candidacy in a multidisciplinary heart team conference. The procedure is performed in an operating room with cardiopulmonary bypass available; general anesthesia and intraoperative transesophageal echocardiography are used. An apicoaortic conduit is constructed by anastomosing a prosthetic conduit with a valve to the left ventricular apex and connecting it to the descending or ascending aorta to bypass the native aortic valve. Postoperative care includes ICU monitoring, hemodynamic support as needed, anticoagulation management based on valve type, wound care, and follow-up imaging to confirm conduit patency and valve function.

Coding Specifications

Modifier	Description	When to Use
`22`

CPT 33440: Aortic Valve Replacement with Pulmonary Autograft and Conduit

CPT-33416-VENTRICULOMYOTOMY-VENTRICULOMYECTOMY-SEPTAL-MYECTOMY

CPT 33416: Ventriculomyotomy/Ventriculomyectomy for Subaortic Stenosis

CPT-33415-SUBVALVULAR-AORTIC-STENOSIS-SURGICAL-RESECTION

CPT 33415: Subvalvular Aortic Stenosis Resection

CPT-33366-TRANSAPICAL-TRANSCATHETER-AORTIC-VALVE-REPLACEMENT-TAVR-TAVI

CPT 33366: Transapical Transcatheter Aortic Valve Replacement (TAVR/TAVI)

CPT-33362-TRANSCATHETER-AORTIC-VALVE-REPLACEMENT-OPEN-FEMORAL-APPROACH

CPT 33362: Transcatheter Aortic Valve Replacement via Open Femoral Artery

CPT-33361-TRANSCATHETER-AORTIC-VALVE-REPLACEMENT-FEMORAL

CPT 33361: Transcatheter Aortic Valve Replacement, Percutaneous Femoral Approach

CPT-33413-ROSS-PROCEDURE-AORTIC-VALVE-REPLACEMENT-WITH-PULMONARY-AUTOGRAFT

CPT 33413: Ross Procedure — Aortic Valve Replacement with Pulmonary Autograft

CPT-33363-TAVR-TAVI-OPEN-AXILLARY-ARTERY-APPROACH

CPT 33363: Transcatheter Aortic Valve Replacement via Open Axillary Artery Approach

CPT-33367-CPB-DURING-TRANSCATHETER-AORTIC-VALVE-REPLACEMENT

CPT 33367: Cardiopulmonary Bypass During Primary TAVI/TAVR

CPT-33411-AORTIC-VALVE-REPLACEMENT-ANNULUS-ENLARGEMENT

CPT 33411: Aortic Valve Replacement with Annulus Enlargement

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Taxonomy Code	Specialty	Notes
`208100000X`	Cardiothoracic Surgery	Primary specialty performing apicoaortic conduit implantation.
`207P00000X`	Cardiovascular Thoracic Surgery	Surgeons with thoracic and cardiovascular focus performing complex aortic operations.
`207RC0000X`	Interventional Cardiology	Participates in preoperative assessment and hybrid procedures; seldom performs open AAC.
`208000000X`	General Surgery	May be involved in complex thoracic cases in some institutions as part of a team.
`163WL0500X`	Anesthesiology - Cardiac	Provides specialized cardiac anesthesia and intraoperative hemodynamic management.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I35.0`	Nonrheumatic aortic (valve) stenosis	Primary indication when severe obstruction leads to symptomatic left ventricular outflow obstruction requiring bypass.
`I35.1`	Nonrheumatic aortic (valve) insufficiency	May coexist with stenosis or contribute to symptoms leading to consideration of AAC in complex anatomy.
`I06.0`	Rheumatic aortic stenosis	Less common in regions with low rheumatic disease but can cause severe valve disease necessitating alternative surgical approaches.
`I08.0`	Congenital malformations of aortic valve	Congenital valve pathology with complex anatomy may prompt use of an apicoaortic conduit.
`I97.120`	Postprocedural cardiac dysfunction following cardiac surgery	Relevant as a potential postoperative diagnosis or complication after complex aortic operations.
`I50.9`	Heart failure, unspecified	Reflects symptomatic heart failure that may prompt definitive intervention to relieve outflow obstruction.
`Z95.2`	Presence of prosthetic heart valve	Documented in patients with prior valve prostheses influencing surgical planning and conduit placement.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`33405`	Replacement, aortic valve, with cardiopulmonary bypass	Alternative open surgical aortic valve replacement often considered instead of AAC when anatomy permits.
`33210`	Insertion of temporary transvenous pacing electrode; without continuous supervision	May be performed pre- or postoperatively when conduction disturbances or heart block occur.
`92980`	Transcatheter aortic valve replacement (TAVR) via transfemoral approach	A less invasive alternative to open AAC for selected patients; part of the differential treatment options.
`93451`	Right and left heart catheterization including intraprocedural injection for coronary angiography	Preoperative coronary angiography to assess coronary anatomy prior to AAC.
`93740`	Hemodynamics study including pulmonary artery pressure monitoring	Used intra- or postoperatively to monitor cardiac output and filling pressures in complex cases.

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