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Official Description

Pericardiectomy, subtotal or complete; with cardiopulmonary bypass

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 33031 refers to a pericardiectomy, which is a surgical intervention involving the removal of the pericardium, the fibrous sac surrounding the heart. This procedure can be performed as either a subtotal or complete excision, depending on the extent of the disease and the specific needs of the patient. The primary indication for this surgery is constrictive pericarditis, a condition characterized by the thickening and fibrosis of the pericardium due to chronic inflammation. This thickening can restrict the heart's ability to function properly, leading to various cardiovascular complications. The surgery is typically conducted through an open approach, utilizing techniques such as median sternotomy or anterolateral thoracotomy to gain access to the heart. During the procedure, the surgeon carefully dissects the thickened pericardium while ensuring the protection of critical structures, such as the phrenic nerves, which are essential for diaphragm function. The excision process involves meticulous dissection around the heart, including the lateral and posterior walls of the left ventricle, the pulmonary veins, and the pulmonary artery, ultimately addressing the diaphragmatic surface and the free wall of the right ventricle, right atrium, and vena cava. It is important to note that this specific code is applicable when the procedure is performed with the assistance of cardiopulmonary bypass, which is a technique that temporarily takes over the function of the heart and lungs during surgery.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The indications for performing a pericardiectomy, as described by CPT® Code 33031, primarily include the following conditions:

  • Constrictive Pericarditis - A chronic inflammatory condition that leads to the thickening and fibrosis of the pericardium, restricting the heart's ability to fill properly and function effectively.

2. Procedure

The procedure for a pericardiectomy with cardiopulmonary bypass involves several critical steps to ensure the safe and effective removal of the pericardium:

  • Step 1: Accessing the Heart - The surgeon begins by performing a median sternotomy or anterolateral thoracotomy to gain access to the thoracic cavity and expose the heart. This initial step is crucial for providing the necessary visibility and access to the pericardium.
  • Step 2: Incising the Pericardium - Once access is achieved, the thickened fibrotic pericardium is incised. The surgeon initiates anterior dissection of the pericardium, taking care to identify and protect the right and left phrenic nerves, which are vital for diaphragm movement and respiratory function.
  • Step 3: Excision of the Pericardium - Starting at the ascending aorta, the surgeon excises the pericardium using both blunt and sharp dissection techniques. This step involves careful dissection over the lateral and posterior walls of the left ventricle, as well as around the pulmonary veins and the pulmonary artery, ensuring complete removal of the diseased tissue.
  • Step 4: Addressing the Diaphragmatic Surface - The next phase of the procedure involves addressing the diaphragmatic surface of the heart, which is critical for ensuring that all fibrotic tissue is removed and that the heart can function without restriction.
  • Step 5: Resection of Additional Structures - The surgeon continues with the resection over the free wall of the right ventricle, right atrium, and vena cava, ensuring that the entire pericardial sac is adequately excised to alleviate the constrictive effects on the heart.

3. Post-Procedure

Post-procedure care following a pericardiectomy with cardiopulmonary bypass typically involves close monitoring of the patient in a recovery setting. Patients may require intensive care to manage potential complications such as bleeding, infection, or arrhythmias. The recovery process may include pain management, respiratory support, and gradual mobilization to promote healing. Follow-up evaluations are essential to assess the patient's recovery and ensure that the heart is functioning properly without the constrictive effects of the pericardium.

Short Descr PARTIAL REMOVAL OF HEART SAC
Medium Descr PRICARDIECTOMY STOT/COMPL W/CARDPULM BYPASS
Long Descr Pericardiectomy, subtotal or complete; 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.

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).
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
62 Two surgeons: when 2 surgeons work together as primary surgeons performing distinct part(s) of a procedure, each surgeon should report his/her distinct operative work by adding modifier 62 to the procedure code and any associated add-on code(s) for that procedure as long as both surgeons continue to work together as primary surgeons. each surgeon should report the co-surgery once using the same procedure code. if additional procedure(s) (including add-on procedure(s) are performed during the same surgical session, separate code(s) may also be reported with modifier 62 added. note: if a co-surgeon acts as an assistant in the performance of additional procedure(s), other than those reported with the modifier 62, during the same surgical session, those services may be reported using separate procedure code(s) with modifier 80 or modifier 82 added, as appropriate.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
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
GC This service has been performed in part by a resident under the direction of a teaching physician
LT Left side (used to identify procedures performed on the left side of the body)
Date
Action
Notes
1990-01-01 Added First appearance in code book in 1990.
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