CPT 33877 Thoracoabdominal Repair Reimbursement | OpenPayer

Summary & Overview

CPT 33877: Thoracoabdominal Aortic Repair with Graft

CPT code 33877 represents open surgical repair of a thoracoabdominal aortic aneurysm or focal aortic wall swelling using a graft, performed with or without cardiopulmonary bypass. This high-acuity vascular procedure is nationally significant due to its complexity, resource intensity, and impact on perioperative morbidity and mortality. Payers commonly covering services of this type include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find clinical and billing context for CPT code 33877, including the procedure’s role in managing thoracoabdominal aortic pathology, expected site of service, and operative considerations tied to cardiopulmonary bypass. The publication outlines national benchmarks and payer coverage patterns where available, summarizes relevant policy or coding guidance changes that affect claim adjudication, and highlights documentation elements frequently reviewed in medical necessity and audit processes.

This summary is intended to orient clinicians, billing professionals, and policy analysts to the core clinical meaning and payer landscape associated with CPT code 33877, and to clarify what topics are addressed in the full publication: benchmarks, policy updates, and clinical context. Data not available in the input is noted where specific payer rates, taxonomies, ICD-10 pairings, and related codes would otherwise appear.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare33877CPTthoracoabdominal aortic repairvascular surgerycardiopulmonary bypassgraft placementinpatient surgery

Billing Code Overview

CPT code 33877 describes surgical repair of an aneurysm or other swelling of the thoracoabdominal aortic wall using a graft. The procedure may be performed with cardiopulmonary bypass.

Service type: Open thoracoabdominal aortic repair with graft placement
Typical site of service: Hospital inpatient operating room or hybrid vascular surgery suite with postoperative inpatient care

Clinical & Coding Specifications

Clinical Context

A typical patient is a 68-year-old male with a symptomatic thoracoabdominal aortic aneurysm presenting with progressive back pain and aortic enlargement on imaging. Preoperative workup includes CT angiography of the chest, abdomen, and pelvis, cardiopulmonary evaluation, and multidisciplinary review by vascular surgery and cardiothoracic surgery. The operative plan is open repair of the thoracoabdominal aortic aneurysm with placement of a prosthetic graft to exclude the aneurysmal segment. Cardiopulmonary bypass may be initiated if distal organ perfusion or proximal aortic control requires it. Intraoperative steps include proximal and distal aortic control, visceral and renal artery reimplantation or bypass as indicated, graft anastomosis, and hemostasis. Postoperative care occurs in a cardiovascular intensive care unit with monitoring for spinal cord ischemia, renal dysfunction, respiratory failure, and wound complications. Typical sites of service are an inpatient operating room in a tertiary care center or academic medical center, with preoperative admission and postoperative ICU stay.

Coding Specifications

Modifier	Description	When to Use
`00`	Default; no modifier	Use when no other modifier applies and service is standard.
`11`

CPT 33864: Aortic Root and Proximal Ascending Aorta Replacement with Valved Graft

CPT-33858-AORTIC-DISSECTION-REPAIR-WITH-GRAFT-AND-CARDIOPULMONARY-BYPASS

CPT 33858: Aortic Dissection Repair with Graft and Cardiopulmonary Bypass

CPT-33875-DESCENDING-THORACIC-AORTA-REPLACEMENT-GRAFT

CPT 33875: Descending Thoracic Aorta Replacement with Graft

CPT-33871-AORTIC-ARCH-REPAIR-SYNTHETIC-GRAFT-CEREBRAL-ISOLATION

CPT 33871: Aortic Arch Repair with Synthetic Graft and Cerebral Isolation

CPT-33863-AORTIC-ROOT-PROXIMAL-ASCENDING-AORTA-REPLACEMENT-VALVE-CONDUIT

CPT 33863: Aortic Root and Proximal Ascending Aorta Replacement with Valve Conduit

CPT-33859-ASCENDING-AORTIC-ANEURYSM-REPAIR-WITH-GRAFT-BYPASS

CPT 33859: Ascending Aortic Aneurysm Repair with Graft and Bypass

CPT-33866-AORTIC-ARCH-GRAFT-WITH-CIRCULATORY-ARREST

CPT 33866: Aortic Arch Graft Placement with Circulatory Arrest

Taxonomy Code	Specialty	Notes
`207RH0000X`	Thoracic and Cardiac Surgery	Primary specialty performing thoracoabdominal aortic repairs.
`207RG0100X`	Vascular Surgery	Frequently performs open and hybrid thoracoabdominal aortic aneurysm repairs.
`208400000X`	General Surgery	May be involved in complex aortic procedures in some centers.
`2080S0122X`	Critical Care Medicine	Manages perioperative and ICU care postoperatively.
`207L00000X`	Cardiothoracic Surgery	Overlaps with thoracic surgical teams for proximal aortic control and bypass management.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I71.4`	Abdominal aortic aneurysm, ruptured	Represents aneurysmal disease of the aorta involving abdominal/ thoracoabdominal segments; rupture necessitates urgent open repair.
`I71.3`	Thoracoabdominal aortic aneurysm, without rupture	Indicates thoracoabdominal aneurysm that may require elective open graft repair to prevent rupture.
`I71.2`	Thoracic aortic aneurysm, ruptured	Thoracic involvement with rupture that can extend into the thoracoabdominal aorta; may require emergent repair.
`I71.9`	Aortic aneurysm, unspecified site, without rupture	Used when documentation lacks precise anatomic site but aneurysmal disease necessitates surgical repair.
`I71.8`	Aortic aneurysm of other specified sites	Captures less common anatomic presentations of aortic aneurysms involving thoracoabdominal segments.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`33878`	Graft replacement of thoracoabdominal aorta, with cardiopulmonary bypass when performed; proximal and distal anastomosis and may include reimplantation of intercostal, visceral, or renal arteries	Often billed for similar extensive thoracoabdominal repairs; may be used when different anatomic extent or specific techniques are documented.
`34830`	Repair of ruptured thoracic aortic aneurysm; with cardiopulmonary bypass	Related emergent procedure for ruptured thoracic aneurysms and may occur in the same clinical spectrum when rupture is present.
`33860`	Replacement of ascending aorta with cardiopulmonary bypass	Performed when proximal aortic involvement requires separate ascending aortic replacement in the same operation or staged approach.
`36215`	Selective catheter placement, arterial system; each first order thoracic, abdominal, or pelvic branch, for diagnostic angiography	Used preoperatively for diagnostic angiography or intraoperative visceral artery assessment; often precedes reimplantation decisions.
`93568`	Endovascular repair, thoracic aortic stent-graft (TEVAR), percutaneous, transluminal	May be performed in hybrid procedures or as an alternative in endovascular-first strategies; can be staged with open repair.
`20999`	Unlisted procedure, musculoskeletal system (placeholder for unusual adjunct procedures)	Used rarely for adjunctive unlisted procedures not captured by standard codes during complex repairs.

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