Coding Ahead
CasePilot
Medical Coding Assistant
Case2Code
Search and Code Lookup Tool
RedactPHI
HIPAA-Compliant PHI Redaction
DetectICD10CM
ICD-10-CM Code Detection
Log in Register free account
1 code page views remaining. Guest accounts are limited to 1 page view. Register free account to get 5 more views.
Log in Register free account

Official Description

Repair sinus of Valsalva aneurysm, with cardiopulmonary bypass

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 33720 involves the surgical repair of a sinus of Valsalva aneurysm using cardiopulmonary bypass. The sinus of Valsalva refers to the three aortic sinuses located within the pericardium at the uppermost part of the aorta, just above the aortic valve cusps. An aneurysm in this area can arise from either congenital or acquired conditions. Congenital aneurysms are rare and typically affect only one sinus, while acquired aneurysms may develop due to various factors such as Marfan syndrome, syphilitic aortitis, cystic medial necrosis, atherosclerosis, the natural aging process, or trauma to the chest. The surgical approach begins with a median sternotomy to gain access to the heart. Following this, venous and arterial cannulas are inserted to establish cardiopulmonary bypass, allowing the heart to be temporarily stopped and the aorta to be cross-clamped. The procedure involves careful exploration and repair of the aneurysm, which may include the removal of any thrombus present, suturing the aneurysm, and possibly using a patch graft for reinforcement. The aorta is then reconstructed, and the patient is gradually taken off bypass, with appropriate post-operative care initiated.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure for repairing a sinus of Valsalva aneurysm with cardiopulmonary bypass is indicated for patients presenting with the following conditions:

  • Congenital Aneurysm A congenital defect resulting in an aneurysm of one or more sinuses of Valsalva, which is a rare cardiac anomaly.
  • Acquired Aneurysm An aneurysm that develops due to various acquired conditions such as Marfan syndrome, syphilitic aortitis, cystic medial necrosis, atherosclerosis, aging, or chest trauma.

2. Procedure

The surgical procedure for repairing a sinus of Valsalva aneurysm involves several critical steps:

  • Step 1: Median Sternotomy The procedure begins with a median sternotomy, which is a surgical incision made along the midline of the chest to provide access to the heart and aorta.
  • Step 2: Establishing Cardiopulmonary Bypass After gaining access, venous and arterial cannulas are inserted to establish cardiopulmonary bypass. This allows for the temporary cessation of heart function while maintaining circulation and oxygenation of the blood.
  • Step 3: Cross-Clamping the Aorta The aorta is then cross-clamped to stop blood flow, and cardioplegic arrest is initiated to protect the heart muscle during the procedure.
  • Step 4: Aneurysm Exposure The aorta is transected to expose the aneurysm. The surgical team carefully explores the aneurysm to assess its size and any associated thrombus.
  • Step 5: Thrombus Removal Any thrombus contained within the aneurysm is meticulously removed to prevent complications.
  • Step 6: Aneurysm Closure The aneurysm is then closed using sutures, which may be reinforced with buttresses for added strength. Alternatively, a tissue or synthetic patch graft may be employed to repair the defect.
  • Step 7: Aorta Reconstruction The aorta is reconstructed either by direct anastomosis or by placing an interposition graft to restore normal blood flow.
  • Step 8: Weaning Off Bypass Once the repair is complete, the patient is gradually weaned off cardiopulmonary bypass, ensuring stable heart function.
  • Step 9: Post-Operative Care Chest tubes are placed as necessary to drain any fluid accumulation, and the chest incision is closed to complete the procedure.

3. Post-Procedure

After the surgical repair of the sinus of Valsalva aneurysm, the patient will require careful monitoring in a post-operative setting. Expected recovery includes observation for any complications such as bleeding or infection. The placement of chest tubes will facilitate the drainage of any excess fluid, and the patient will be assessed for stable hemodynamics as they are weaned off cardiopulmonary bypass. Follow-up care will involve regular evaluations to ensure proper healing and function of the heart and aorta.

Short Descr REPAIR OF HEART DEFECT
Medium Descr RPR SINUS VALSALVA ANEURYSM
Long Descr Repair sinus of Valsalva aneurysm, with cardiopulmonary bypass
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 1 - Co-surgeons could be paid, though supporting documentation is required...
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P2F - Major procedure, cardiovascular-Other
MUE 1
CCS Clinical Classification 49 - Other OR heart procedures

This is a primary code that can be used with these additional add-on codes.

33257 Addon Code MPFS Status: Active Code APC C Illustration for Code Operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedure(s), limited (eg, modified maze procedure) (List separately in addition to code for primary procedure)
33259 Addon Code MPFS Status: Active Code APC C Illustration for Code Operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedure(s), extensive (eg, maze procedure), with cardiopulmonary bypass (List separately in addition to code for primary procedure)
34714 Addon Code MPFS Status: Active Code APC N ASC N1 Open femoral artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by groin incision, unilateral (List separately in addition to code for primary procedure)
34716 Addon Code MPFS Status: Active Code APC N ASC N1 Open axillary/subclavian artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by infraclavicular or supraclavicular incision, unilateral (List separately in addition to code for primary procedure)
34833 Addon Code Resequenced Code MPFS Status: Active Code APC C CPT Assistant Article Open iliac artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by abdominal or retroperitoneal incision, unilateral (List separately in addition to code for primary procedure)
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CR Catastrophe/disaster related
GC This service has been performed in part by a resident under the direction of a teaching physician
Date
Action
Notes
Pre-1990 Added Code added.
Code
Description
Code
Description
Code
Description
Code
Description
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"