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Official Description

Coronary artery bypass, vein only; single coronary venous graft

© 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 due to conditions such as atherosclerosis, it can lead to ischemic heart disease, which may result in chest pain (angina) or even myocardial infarction (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 or narrowed sections of the coronary arteries, thereby restoring adequate blood supply to the heart. In the case of CPT® Code 33510, the procedure specifically involves the use of a single venous graft, typically harvested from the greater saphenous vein located in the leg. The surgical process begins with the harvesting of the vein, 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 cardiopulmonary bypass, where the patient is connected to a heart-lung machine. The prepared vein graft is then meticulously sewn into place, connecting one end to the ascending aorta and the other end to the coronary artery beyond the blockage. This procedure is critical for patients with significant coronary artery disease, as it can significantly improve blood flow to the heart and alleviate symptoms associated with ischemic heart conditions.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 33510 is indicated for patients who exhibit significant narrowing or blockage of one or more coronary arteries, which can lead to ischemic heart disease or myocardial infarction. The following conditions may warrant the performance of this surgical intervention:

  • Ischemic Heart Disease - A condition characterized by reduced blood flow to the heart muscle due to narrowed coronary arteries.
  • Myocardial Infarction - A medical emergency resulting from the blockage of blood flow to the heart, leading to damage or death of heart muscle tissue.
  • Severe Angina - Persistent chest pain or discomfort that occurs due to inadequate blood supply to the heart muscle, often exacerbated by physical activity or stress.

2. Procedure

The surgical procedure for CPT® Code 33510 involves several critical steps to ensure successful coronary artery bypass grafting using a single venous graft:

  • Step 1: Harvesting the Vein - The procedure begins with the harvesting of the greater saphenous vein from one or both legs. This involves making incisions in the thigh or calf to access the vein, which is then carefully removed and prepared for grafting.
  • Step 2: Preparing the Patient - The patient is positioned appropriately, and anesthesia is administered. An incision is made in the chest to access the heart, which may involve dividing the sternum and retracting the ribs to provide a clear view of the cardiac structures.
  • Step 3: Initiating Bypass Technique - The surgical team may choose to perform the procedure using the off-pump coronary artery bypass (OPCAB) technique, allowing surgery on a beating heart, or by initiating cardiopulmonary bypass, where the patient is connected to a heart-lung machine to take over the function of the heart and lungs during the procedure.
  • Step 4: Attaching the Graft - The prepared vein graft is sewn into place, with one end attached to the ascending aorta and the other end connected to the diseased coronary artery beyond the blockage. This creates a new pathway for blood flow to the heart muscle.
  • Step 5: Concluding the Procedure - If cardiopulmonary bypass was used, it is carefully discontinued, and the heart is allowed to resume its normal function. The surgical team ensures that all bleeding is controlled and that the chest is closed securely.

3. Post-Procedure

After the completion of the coronary artery bypass grafting procedure, patients are typically monitored in a recovery area or intensive care unit. Post-procedure care includes managing pain, monitoring vital signs, and ensuring proper heart function. Patients may be advised on activity restrictions and rehabilitation programs to aid in recovery. Follow-up appointments are essential to assess the success of the graft and the overall health of the patient. Additionally, lifestyle modifications and medication management may be recommended to prevent further cardiovascular issues.

Short Descr CABG VEIN SINGLE
Medium Descr CORONARY ARTERY BYPASS 1 CORONARY VENOUS GRAFT
Long Descr Coronary artery bypass, vein only; single coronary venous graft
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)
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).
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
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
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.
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).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) 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).
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.
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.
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.)
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).
AG Primary physician
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CR Catastrophe/disaster related
ET Emergency services
GW Service not related to the hospice patient's terminal condition
LC Left circumflex coronary artery
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
RC Right coronary artery
RT Right side (used to identify procedures performed on the right side of the body)
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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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2011-01-01 Changed Short description changed.
Pre-1990 Added Code added.
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