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Official Description

Coronary artery bypass, vein only; 2 coronary venous grafts

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The coronary arteries are vital blood vessels that supply oxygen and essential nutrients to the heart muscle. When these arteries become narrowed or blocked, it can lead to serious conditions such as ischemic heart disease and myocardial infarction, commonly known as a heart attack. To address these issues, a surgical procedure known as coronary artery bypass grafting (CABG) is performed. This procedure aims to reroute blood flow around the obstructed arteries, thereby restoring adequate blood supply to the heart. In the case of CPT® Code 33511, the procedure specifically involves the use of veins, typically harvested from the greater saphenous veins located in the legs. The surgical process begins with the harvesting of these veins, which may require incisions in the thigh or calf. Following this, an incision is made in the chest to access the heart, where the sternum is divided, and the ribs are retracted to provide a clear view of the heart. The surgery can be performed using either the off-pump coronary artery bypass (OPCAB) technique, which allows the procedure to be conducted on a beating heart, or through the use of cardiopulmonary bypass, where the patient is connected to a heart-lung machine. The prepared vein grafts are then meticulously sewn into place, connecting one end to the ascending aorta and the other to the affected coronary artery beyond the blockage. This specific code, 33511, is utilized when two venous grafts are employed in the bypass procedure, highlighting the complexity and critical nature of this life-saving surgery.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 33511 is indicated for patients who exhibit significant narrowing or blockage of the coronary arteries, which can lead to ischemic heart disease or myocardial infarction. The following conditions may warrant the performance of this surgical intervention:

  • Coronary Artery Disease (CAD) - A condition characterized by the buildup of plaque in the coronary arteries, leading to reduced blood flow to the heart muscle.
  • Angina Pectoris - Chest pain or discomfort that occurs when the heart muscle does not receive enough blood, often triggered by physical activity or stress.
  • Myocardial Infarction - A heart attack resulting from the complete blockage of a coronary artery, causing damage to the heart muscle.
  • Severe Coronary Artery Blockage - Significant obstruction in one or more coronary arteries that cannot be managed effectively with medication or less invasive procedures such as angioplasty.

2. Procedure

The surgical procedure associated with CPT® Code 33511 involves several critical steps to ensure successful coronary artery bypass grafting using two venous grafts. The process begins with the harvesting of the greater saphenous veins from the legs, which may require making incisions in the thigh or calf. This step is essential as these veins will serve as the grafts to bypass the blocked coronary arteries. Once the veins are harvested, the surgeon prepares them for grafting by cleaning and trimming them to the appropriate length.

  • Step 1: Incision and Access The next step involves making an incision in the chest to access the heart. The surgeon divides the sternum and retracts the ribs to create a clear view of the heart, which is crucial for the subsequent steps of the procedure.
  • Step 2: Choice of Technique The procedure can be performed using either the off-pump coronary artery bypass (OPCAB) technique or by initiating cardiopulmonary bypass. If the OPCAB technique is chosen, the surgery is conducted on a beating heart, which may involve the administration of medication to slow the heart rate. Alternatively, if cardiopulmonary bypass is utilized, the patient is connected to a heart-lung machine that takes over the function of pumping blood and oxygenating it during the surgery.
  • Step 3: Grafting After the appropriate technique is selected, the prepared vein grafts are sewn into place. One end of each vein graft is attached to the ascending aorta, while the other end is connected to the diseased coronary artery at a point beyond the blockage. This creates a new pathway for blood to flow to the heart muscle, effectively bypassing the obstructed area.
  • Step 4: Conclusion of Procedure If cardiopulmonary bypass was used, it is discontinued at the end of the procedure. The surgeon ensures that the grafts are functioning properly and that there is adequate blood flow before closing the chest incision.

3. Post-Procedure

Following the completion of the coronary artery bypass grafting procedure, patients typically require close monitoring in a recovery unit. Post-operative care includes managing pain, monitoring vital signs, and ensuring that the grafts are functioning correctly. Patients may experience a hospital stay of several days, during which they will be assessed for any complications such as infection or graft failure. Rehabilitation and lifestyle modifications are often recommended to support recovery and improve heart health. Patients will also receive instructions on follow-up appointments and any necessary medications to prevent blood clots and manage heart health.

Short Descr CABG VEIN TWO
Medium Descr CORONARY ARTERY BYPASS 2 CORONARY VENOUS GRAFTS
Long Descr Coronary artery bypass, vein only; 2 coronary venous grafts
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) 0 - Co-surgeons not permitted for this procedure.
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) P2A - Major procedure, cardiovascular-CABG
MUE 1
CCS Clinical Classification 44 - Coronary artery bypass graft (CABG)

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

33141 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting PUB 100 CPT Assistant Article Transmyocardial laser revascularization, by thoracotomy; performed at the time of other open cardiac procedure(s) (List separately in addition to code for primary procedure)
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)
33258 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), without cardiopulmonary bypass (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)
33508 Addon Code MPFS Status: Active Code APC N ASC N1 Illustration for Code Endoscopy, surgical, including video-assisted harvest of vein(s) for coronary artery bypass procedure (List separately in addition to code for primary procedure)
33530 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting CPT Assistant Article Illustration for Code Reoperation, coronary artery bypass procedure or valve procedure, more than 1 month after original operation (List separately in addition to code for primary procedure)
33572 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting CPT Assistant Article Illustration for Code Coronary endarterectomy, open, any method, of left anterior descending, circumflex, or right coronary artery performed in conjunction with coronary artery bypass graft procedure, each vessel (List separately in addition to 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)
35500 Addon Code MPFS Status: Active Code APC N CPT Assistant Article Harvest of upper extremity vein, 1 segment, for lower extremity or coronary artery bypass procedure (List separately in addition to code for primary procedure)
35572 Addon Code MPFS Status: Active Code APC N ASC N1 CPT Assistant Article Illustration for Code Harvest of femoropopliteal vein, 1 segment, for vascular reconstruction procedure (eg, aortic, vena caval, coronary, peripheral artery) (List separately in addition to code for primary procedure)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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).
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.
55 Postoperative management only: when 1 physician or other qualified health care professional performed the postoperative management and another performed the surgical procedure, the postoperative component may be identified by adding modifier 55 to the usual procedure number.
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
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.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
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).
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
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).
CR Catastrophe/disaster related
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)
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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Action
Notes
2011-01-01 Changed Short description changed.
2010-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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